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 to change the frequency of a current by 1 Hz
None of these
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 number of turns of wire in an inductor multiplied by the amount of current flowing through it

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Electronic Principles
Which one of the following principles best describes the basic operation of a generator?

Current flowing through a conductor generates a magnetic field
Current is induced in a conductor that is moving through a magnetic field
None of these
Like magnetic poles repel; unlike poles attract
Like magnetic poles attract; unlike poles repel

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