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Electricity and Magnetism 3 rd Level Students. 231 Phys-4. Electricity and Magnetism. CHAPETR 1 Electric forces and Coulombs\' law. Properties of electric charges Coulomb\'s law Electric force due to point charge Electric forces due to group of charges.

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Presentation Transcript
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Electricity and Magnetism

CHAPETR 1

Electric forces and Coulombs\' law

slide3

Properties of electric charges

  • Coulomb\'s law
  • Electric force due to point charge
  • Electric forces due to group of charges.
slide4

Ex. 1 Three point charges placed on a horizontal line as shown in Fig.1. Find the net force acting on q2?

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Ex.2Three charges lie along x-axis, q1=+9 µc placed at the origin and q2= +16 µc placed at x = 90 cm. Where a negative charge q3 must be placed between them such that, the net force acting on it is zero?

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Home work

Ex. 3 Three point charges [q1= q3=+5µc and q2=+2µc] are located at the corners of a triangle as in Fig.

  • Find the net electric force acting on q2?
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Home work

Ex.4Two point charges q1= q2=+2µc located at x = 0 and y = 30 cm and x = 0 and y = - 30 cm, respectively.

  • Calculate the magnitude and direction of the net force acting on a third point charge,q3 =+4µc placed at x = 40 cm and y = 0 ?
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