Alternating current

Alternating voltage (V) is represented by the equation

• V(t) = Vm eωt

• V(t) = Vm sin ωt

• V(t) = Vm cot ωt

• V(t) = Vm tan ωt

The unit of frequency is

• Cycle

• Cycle-second

• Hertz/second

• hertz

A vector quantity has

• Only magnitude

• Only direction

• Both (a) and (b)

• none of these

The number of instantaneous values between zero and the peak value is

• Zero

• One

• Eleven

• Infinity

The most common waveforms of ac is

• square wave

• triangular wave

• complex wave

• sine wave

The variation of a quantity such as voltage or current shown on a graph is known as ___________

• Waveform

• Peak value

• Instantaneous value

• Period

What is the duration of one cycle known as _________

• Waveform

• Peak value

• Instantaneous value

• Period

The repetition of a variable quantity, recurring at equal intervals, is known as ___________

• Waveform

• Instantaneous value

• Cycle

• Period

The value of a given waveform at any instant time is termed as ___________

• Waveform

• Instantaneous value

• Cycle

• Period

The maximum instantaneous value measured from zero value is known as?

• Peak value

• Peak to peak value

• Cycle

• Period