Electronic Principles
Which one of the following equations most directly determines the power dissipation of a resistance when you know the power dissipation of a resistance when you know the voltage drop and current?

I = P/E
P = I2R
P = IE
None of these
P = E2/R

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Electronic Principles
One henry of inductance is defined as:

the amount of counter emf required to reduce a current to 1 A
the amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second
the amount of inductance required to change the frequency of a current by 1 Hz
None of these
the number of turns of wire in an inductor multiplied by the amount of current flowing through it

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