AC FUNDAMENTALS, CIRCUIT AND CIRCUIT THEORY QUIZ

The period of a sine wave is ___________ seconds. Its frequency is

40 Hz

50 Hz

20 Hz

30 Hz

TRUE ANSWER : ?
YOUR ANSWER : ?

The power factor of a D.C. circuit is always

Greater than unity

Unity

Zero

Less than unity

TRUE ANSWER : ?
YOUR ANSWER : ?

The time constant of a series R-C circuit is given by

RC2

RC

R2C

R/C

TRUE ANSWER : ?
YOUR ANSWER : ?

An A.C. voltage is impressed across a pure resistance of 3.5 ohms in parallel with a pure inductance of impedance of 3.5 ohms,

None of the listed here

Both resistance and inductance carry equal currents

The current through the resistance is more

The current through the resistance is less

TRUE ANSWER : ?
YOUR ANSWER : ?

In a loss-free R-L-C circuit the transient current is

Non-oscillating

Sinusoidal

Oscillating

Square wave

TRUE ANSWER : ?
YOUR ANSWER : ?

A parallel AC. circuit in resonance will

Have current in each section equal to the line current

Have a high impedance

Have a high voltage developed across each inductive and capacitive section

Act like a resistor of low value

TRUE ANSWER : ?
YOUR ANSWER : ?

In an A.C. circuit power is dissipated in

Resistance only

None of the listed here

Capacitance only

Inductance only

TRUE ANSWER : ?
YOUR ANSWER : ?

In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will

Be reduced by half

Be four times as high

Be reduced to one fourth

Be doubled

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following statements pertains to resistors only?

Oppose sudden changes in voltage

Connecting them in parallel increases the total value

Can dissipate considerable amount of power

Can act as energy storage devices

TRUE ANSWER : ?
YOUR ANSWER : ?

Inductance of coil

Is unaffected by the supply frequency

Becomes zero with the increase in supply frequency

Increases with the increase in supply frequency

Decreases with the increase in supply frequency

TRUE ANSWER : ?
YOUR ANSWER : ?