AC Fundamentals, Circuit and Circuit Theory
The frequency of an alternating current is

The number of cycles generated in one minute
The speed with which the alternator runs
The number of electrons passing through a point in one second
The number of waves passing through a point in one second

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AC Fundamentals, Circuit and Circuit Theory
Pure inductive circuit

Takes power from the line during some part of the cycle and then returns back to it during other part of the cycle
Consumes some power on average
Does not take power at all from a line
None of the listed here

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AC Fundamentals, Circuit and Circuit Theory
Which of the following refers to a parallel circuit?

The current through any one element is less than the source current
The voltage across element is in proportion to it's resistance value
The current through each element is same
The equivalent resistance is greater than any one of the resistors

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