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Electromagnetic Induction. Voltmeter. -. +. Stationary. N. N S. Electromagnetic Induction. Voltmeter. -. +. Magnet is moved towards Coil. N. N S. Electromagnetic Induction. Voltmeter. -. +. Magnet moved towards Coil. N.

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electromagnetic induction
Electromagnetic Induction

Voltmeter

-

+

Stationary

N

N S

electromagnetic induction1
Electromagnetic Induction

Voltmeter

-

+

Magnet is moved towards Coil

N

N S

electromagnetic induction2
Electromagnetic Induction

Voltmeter

-

+

Magnet moved towards Coil

N

N S

A current is generated that Induces a magnetic field that opposes the

increase in magnetic field lines directed to west by the north pole of the bar magnet.

electromagnetic induction3
Electromagnetic Induction

Voltmeter

An Emf is induced. - A voltage or potential difference is

Induced.

-

+

Magnet moved towards Coil

N

N S

A current is generated that Induces a magnetic field that opposes the

increase in magnetic field lines directed to west by the north pole of the bar magnet.

electromagnetic induction4
Electromagnetic Induction

Voltmeter

An Emf is induced.

-

+

A current is induced in

a direction consistent

with the induced magnetic

field

Moved towards Coil

N

N S

A current is generated that Induces a magnetic field that opposes the

increase in magnetic field lines directed to west by the north pole of the bar magnet.

electromagnetic induction5
Electromagnetic Induction

Voltmeter

An Emf is induced.

-

+

A current is induced in

a direction consistent

with the induced magnetic

Field.

Moved towards Coil

Thumb -Current

Curled Fingers-

Magnetic Field

N

N S

A current is generated that Induces a magnetic field that opposes the

increase in magnetic field lines directed to west by the north pole of the bar magnet.

electromagnetic induction6
Electromagnetic Induction

Voltmeter

An Emf is induced.

-

+

A current is induced in

a direction consistent

with the induced magnetic

Field.

Moved towards Coil

Thumb -Current

Curled Fingers-

Magnetic Field

N

N S

A current is generated that Induces a magnetic field that opposes the

increase in magnetic field lines directed to west by the north pole of the bar magnet.

electromagnetic induction7
Electromagnetic Induction

Voltmeter

An Emf is induced.

-

+

A current is induced in

a direction consistent

with the induced magnetic

Field.

Moved towards Coil

Thumb -Current

Curled Fingers-

Magnetic Field

N

N S

Bulb lights

A current is generated that Induces a magnetic field that opposes the

increase in magnetic field lines directed to west by the north pole of the bar magnet.

electromagnetic induction8
Electromagnetic Induction

Voltmeter

An Emf is induced.

-

+

A current is induced in

a direction consistent

with the induced magnetic

Field.

Moved towards Coil

Thumb -Current

Curled Fingers-

Magnetic Field

N

N S

Bulb lights

A current is generated that Induces a magnetic field that opposes the

increase in magnetic field lines directed to west by the north pole of the bar magnet.

electromagnetic induction9
Electromagnetic Induction

Voltmeter

-

+

Stationary

N

N S

electromagnetic induction10
Electromagnetic Induction

Voltmeter

-

+

Magnet is away from Coil

N

N S

electromagnetic induction11
Electromagnetic Induction

Voltmeter

-

+

Magnet moved towards Coil

N

N S

Induced magnetic field opposes the decrease in magnetic

field lines directed to west by the north pole of the bar magnet

moved to the right

electromagnetic induction12
Electromagnetic Induction

Voltmeter

An Emf is induced.

-

+

Magnet moved away from coil

N

N S

Induced magnetic field opposes the decrease in magnetic

field lines directed to west by the north pole of the bar magnet moved east

electromagnetic induction13
Electromagnetic Induction

Voltmeter

An Emf is induced.

-

+

A current is induced in

a direction consistent

with the induced magnetic

field

Moved away from Coil

N

N S

Induced magnetic field opposes the decrease in magnetic

field lines directed to west by the north pole of the bar magnet moved east

electromagnetic induction14
Electromagnetic Induction

Voltmeter

An Emf is induced.

-

+

A current is induced in

a direction consistent

with the induced magnetic

Field.

Moved away from coil

Thumb -Current

Curled Fingers-

Magnetic Field

N

N S

Induced magnetic field opposes the decrease in magnetic

field lines directed to west by the north pole of the bar magnet moved east.

electromagnetic induction15
Electromagnetic Induction

Voltmeter

An Emf is induced.

-

+

A current is induced in

a direction consistent

with the induced magnetic

Field.

Moved away from Coil

Thumb -Current

Curled Fingers-

Magnetic Field

N

N S

Induced magnetic field opposes the decrease in magnetic

field lines directed to west by the north pole of the bar magnet moved east.

electromagnetic induction16
Electromagnetic Induction

Voltmeter

An Emf is induced.

-

+

A current is induced in

a direction consistent

with the induced magnetic

Field.

Moved away from coil

Thumb -Current

Curled Fingers-

Magnetic Field

N

N S

Induced magnetic field opposes the decrease in magnetic

field lines directed to west by the north pole of the bar magnet moved east.

electromagnetic induction17
Electromagnetic Induction

Voltmeter

An Emf is induced.

-

+

A current is induced in

a direction consistent

with the induced magnetic

Field.

Moved away from coil

Thumb -Current

Curled Fingers-

Magnetic Field

N

N S

Bulb

Lights

Induced magnetic field opposes the decrease in magnetic

field lines directed to west by the north pole of the bar magnet moved east.

electromagnetic induction18
Electromagnetic Induction

Voltmeter

An Emf is induced.

-

+

A current is induced in

a direction consistent

with the induced magnetic

Field.

Moved away from Coil

Thumb -Current

Curled Fingers-

Magnetic Field

N

N S

Bulb

Lights

Induced magnetic field opposes the decrease in magnetic

field lines directed to west by the north pole of the bar magnet moved east.

slide20

Voltmeter

Emf is induced

-

+

Stationary

.

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

slide21

Voltmeter

Emf is induced

-

+

Moved to left

Current is induced that

creates magnetic field

which

opposes

decrease

in magnetic

field lines into

the paper.

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

Decrease of field lines on left side of moving bar

Induced magnetic field opposes decrease in magnetic field lines

slide22

Voltmeter

Emf is induced

-

+

Moved to left

Current is induced that

creates magnetic field

which

opposes

decrease

in magnetic

field lines into

the paper.

+ + + + + + + + + +

+ +

+ + + + + + + + + +

+ +

+ + + + + + + + + +

+ +

+ + + + + + + + + +

Decrease of field lines on left side of moving bar

Induced magnetic field opposes decrease in magnetic field lines

slide23
Decrease of field lines on left side of moving bar

Voltmeter

Emf is induced

-

+

Moved to left

Current is induced that

creates magnetic field

which

opposes

decrease

in magnetic

field lines into

the paper.

+ + + + + + + + + +

+ +

+ + + + + + + + + +

+ +

+ + + + + + + + + +

+ +

+ + + + + + + + + +

Induced magnetic field opposes decrease in magnetic field lines

slide24

Voltmeter

Emf is induced

-

+

Moved to left

Current is induced that

creates magnetic field

which

opposes

decrease

in magnetic

field lines into

the paper.

+ + + + + + + + + +

+ +

+ + + + + + + + + +

+ +

+ + + + + + + + + +

+ +

+ + + + + + + + + +

Decrease of field lines on left side of moving bar

Induced magnetic field opposes decrease in magnetic field lines

slide25

Voltmeter

Emf is induced

-

+

Moved to left

Current is induced that

creates magnetic field

which

opposes

decrease

in magnetic

field lines into

the paper.

+ + + + + + + + + +

+ +

+ + + + + + + + + +

+ +

+ + + + + + + + + +

+ +

+ + + + + + + + + +

Decrease of field lines on left side of moving bar

Induced magnetic field opposes decrease in magnetic field lines

slide26

Voltmeter

Emf is induced

-

+

Moved to left

The current that is induced

creates a magnetic field

which

opposes

decrease

in magnetic

field lines into

the paper.

+ + + + + + + + + +

+ +

+ + + + + + + + + +

+ +

+ + + + + + + + + +

+ +

+ + + + + + + + + +

Decrease of field lines on left side of moving bar

Induced magnetic field opposes decrease in magnetic field lines

slide27

Voltmeter

Emf is induced

-

+

Moved to left

The current that is induced

creates a magnetic field

which

opposes

decrease

in magnetic

field lines into

the paper.

+ + + + + + + + + +

+ +

+ + + + + + + + + +

+ +

+ + + + + + + + + +

+ +

+ + + + + + + + + +

Decrease of field lines on left side of moving bar

Induced magnetic field opposes decrease in magnetic field lines

slide28

Voltmeter

Emf is induced

-

+

Moved to left

The current that is induced

creates a magnetic field

which

opposes

decrease

in magnetic

field lines into

the paper.

+ + + + + + + + + +

+ +

+ + + + + + + + + +

+ +

+ + + + + + + + + +

+ +

+ + + + + + + + + +

Decrease of field lines on left side of moving bar

Induced magnetic field opposes decrease in magnetic field lines

slide29

Voltmeter

Emf is induced

-

+

Moved to left

The current that is induced

creates a magnetic field

which

opposes

decrease

in magnetic

field lines into

the paper.

+ + + + + + + + + +

+ +

+ + + + + + + + + +

+ +

+ + + + + + + + + +

+ +

+ + + + + + + + + +

Decrease of field lines on left side of moving bar

Bulb Lights

Induced magnetic field opposes decrease in magnetic field lines

slide30

Voltmeter

-

+

Stationary

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

slide31

Voltmeter

-

+

Moved to right

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

increase of the field lines into the paper on left side of moving bar

slide32

Voltmeter

-

+

Moved to right

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

increase of the field lines into the paper on left side of moving bar

Induced magnetic field opposes increase in magnetic field lines

slide33

Voltmeter

-

+

Moved to right

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

increase of the field lines into the paper on left side of moving bar

Induced magnetic field opposes increase in magnetic field lines

slide34

Voltmeter

Emf is induced

-

+

Moved to right

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

increase of the field lines into the paper on left side of moving bar

Induced magnetic field opposes increase in magnetic field lines

slide35

Voltmeter

Emf is induced

-

+

Moved to right

Current is induced that

creates magnetic field

which

opposes

increase

in magnetic

field lines into

the paper.

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

increase of the field lines into the paper on left side of moving bar

Induced magnetic field opposes increase in magnetic field lines

slide36

Voltmeter

Emf is induced

-

+

Moved to right

Current is induced that

creates magnetic field

which

opposes

increase

in magnetic

field lines into

the paper.

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

increase of the field lines into the paper on left side of moving bar

Induced magnetic field opposes increase in magnetic field lines

slide37

Voltmeter

Emf is induced

-

+

Moved to right

Current is induced that

creates magnetic field

which

opposes

increase

in magnetic

field lines into

the paper.

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

increase of the field lines into the paper on left side of moving bar

Induced magnetic field opposes increase in magnetic field lines

slide38

Voltmeter

Emf is induced

-

+

Moved to right

Current is induced that

creates magnetic field

which

opposes

increase

in magnetic

field lines into

the paper.

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

increase of the field lines into the paper on left side of moving bar

Bulb lights

Induced magnetic field opposes increase in magnetic field lines

slide39

Voltmeter

Emf is induced

-

+

Moved to right

Current is induced that

creates magnetic field

which

opposes

increase

in magnetic

field lines into

the paper.

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

+ + + + + + + + + +

increase of the field lines into the paper on left side of moving bar

Bulb lights

Induced magnetic field opposes increase in magnetic field lines

slide40
Stationary

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

slide41
Pushed in

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

slide42
Pushed in
  • Decrease in the number of field lines

Into the paper contained ine the loop

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

slide43

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

slide44
Induced current is clockwise

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

slide45
Induced current is clockwise
  • Induced current magnetic field opposes

decrease in the field lines into the paper

+ + + + + + + + + + + + + +

+ +

+ + + + + + + + + + + + + +

+ +

+ + + + + + + + + + + + + +

+ +

+ + + + + + + + + + + + + +

slide46
Wire loop stretched out

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

slide47
Wire loop stretched out
  • There is an increase in the field lines into the paper inside the loop

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

slide48
Wire loop stretched out
  • There is an increase in the field lines into the paper inside the loop

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

wire loops
Wire loops
  • Induced current produces magnetic field lines that oppose the increase in the number of field lines ino the paper

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

wire loops1
Wire loops
  • Induced current produces magnetic field lines that oppose the increase in the number of field lines into the paper

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

+ + + + + + + + + + + + + +

formula associated with the production of an emf
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA
  • t
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e = N m2 = N m = J = J = J = volt
  • m A s A s A s C s C
  • s
formula associated with the production of an emf1
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA
  • t
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e = N m2 = N m = J = J = J = volt
  • m A s A s A s C s C
  • s
formula associated with the production of an emf2
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux = magnetic change
  • t t time time
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e = N m2 = N m = J = J = J = volt
  • m A s A s A s C s C
  • s
formula associated with the production of an emf3
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux = magnetic change
  • t t time time
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e = N m2 = N m = J = J = J = volt
  • m A s A s A s C s C
  • s
formula associated with the production of an emf4
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t time time
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e = N m2 = N m = J = J = J = volt
  • m A s A s A s C s C
  • s
formula associated with the production of an emf5
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e = N m2 = N m = J = J = J = volt
  • m A s A s A s C s C
  • s
formula associated with the production of an emf6
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e = N m2 = N m = J = J = J = volt
  • m A s A s A s C s C
  • s
formula associated with the production of an emf7
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e = N m2 = N m = J = J = J = volt
  • m A s A s A s C s C
  • s
formula associated with the production of an emf8
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e = N m2 = N m = J = J = J = volt
  • m A s A s A s C s C
  • s
formula associated with the production of an emf9
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e = N m2 = N m = J = J = J = volt
  • m A s A s A s C s C
  • s
formula associated with the production of an emf10
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • Dimension Analysis – Unit Analysis
  • e = N m2 = N m = J = J = J = volt
  • m A s A s A s C s C
  • s
formula associated with the production of an emf11
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e= N m2 = N m = J = J = J = volt
  • m A s A s A s C s C
  • B strength s
formula associated with the production of an emf12
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e= N m2 = N m = J = J = J = volt
  • m A s A s A s C s C
  • B strength Area s
formula associated with the production of an emf13
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e= N m2 = N m = J = J = J = volt
  • m A s A s A s C s C
  • B strength Area Time s
formula associated with the production of an emf14
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e= N m2 = N m= J = J = J = volt
  • m A s A s A s C s C
  • B strength Area Time s
formula associated with the production of an emf15
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e= N m2 = N m = J =J = J = volt
  • m A s A s A sC s C
  • B strength Area Time s
formula associated with the production of an emf16
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e= N m2 = N m = J =J= J = volt
  • m A s A s A sC s C
  • B strength Area Time s s
formula associated with the production of an emf17
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e= N m2 = N m = J =J = J = volt
  • m A s A s A sC sC
  • B strength Area Time s s
formula associated with the production of an emf18
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • B = magnetic field strength in Tesla = 1 N
  • m A
  • A = area = m2
  • t = s
  • e= N m2 = N m = J =J = J =volt
  • m A s A s A sC sC
  • B strength Area Time s s
formula associated with the production of an emf19
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • A = l x l
  • e = D B l x l = DB l x l = D B l V
  • t t

x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x

formula associated with the production of an emf20
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • A = l x l
  • e = D B l x l = DB l x l = D B l V
  • t t

x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x

formula associated with the production of an emf21
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • A = l x l
  • e = D B l x l = DB l x l = D B l V
  • t t

x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x

formula associated with the production of an emf22
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • A = l x l
  • e = D B l x l = DB l x l = D B l V
  • t t

x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x

formula associated with the production of an emf23
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • A = l x l
  • e = D B l x l =DB l x l =D B l V
  • t t

x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x

formula associated with the production of an emf24
Formula associated with the production of an emf
  • emf = potential difference generated

measured in volts

  • e=D BA or Fm = magnetic flux =magnetic change
  • t t timetime
  • A = l x l
  • e = D B l x l =DB l x l =D B l V
  • t t

x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x

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