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## PowerPoint Slideshow about 'Chapter 6' - truong

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### Chapter 6

Ohm’s Law, Work, Energy and Power

What is work?

Motion must take place for work to take place

Work takes place when electrical energy is converted to mechanical energy and vice versa

What is the unit for work?

Joule (J)

(This is also the same unit for Energy)

What about electrical work? (no motion involved?)

1 Joule = Energy required to raise 1 Coulomb of charge through a potential difference of 1 Volt

What is Power?

Power is how much work can be done in a specific amount of time

(Like MPH)

Units for Power is Watts (W)

(Like MPH)

W = Q * V

P = V2/R

Power

P = I2 * R

P = ? Watts

I = 5 Amps

V = 50 Volts

V = ? Volts

R = 10 Ohms

P = 250 Watts

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