Electronic Principles
If a load resistance is 1 kW, a stiff voltage source has a resistance of

More than 100 k Ohm
Less than 100 k Ohm
At least 10 Ohm
None of these
less than 10 Ohm

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Electronic Principles
Doubling the operating frequency of a purely inductive circuit:

has no effect on the current through the inductors
doubles the amount of current through the inductors
cuts the current through the inductors one-half
increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit
None of these

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Electronic Principles
Which one of the following phrases most accurately describes a purely capacitive circuit?

Resistances provide the only opposition to current flow
Combinations of resistance and capacitive reactance provide any opposition to current flow
Capacitive reactance provides the only opposition to current flow
None of these
The ac voltage leads the current by 90 degree

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