Electronic Principles
At room temperature a conductor has low many holes?

None of these
many
Same number as free electrons
Only those produced by thermal energy
less than the free electrons

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Electronic Principles
One henry of inductance is defined as:

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
None of these
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

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