AC FUNDAMENTALS, CIRCUIT AND CIRCUIT THEORY QUIZ

Inductance affects the direct current flow

At all the time of operation

Only at the time of turning on

Only at the time of turning off

At the time of turning on and off

TRUE ANSWER : ?
YOUR ANSWER : ?

The phosphors for which of the following pair are 180° out of phase for VL, VC and VR?

None of the listed here

VC and VL

VC and VR

VL and VR

TRUE ANSWER : ?
YOUR ANSWER : ?

Pure inductive circuit takes power from the A.C. line when

Applied voltage increases but current decreases

Applied voltage decreases but current increases

Both applied voltage and current decrease

Both applied voltage and current increase

TRUE ANSWER : ?
YOUR ANSWER : ?

The phase difference between voltage and current wave through a circuit element is given as 30Â°. The essential condition is that

Both waves must have identical peak values

Both waves must have zero value at the same time

None of these

Both waves must have same frequency

TRUE ANSWER : ?
YOUR ANSWER : ?

The frequency of domestic power supply in India is

150 Hz

50 Hz

200 Hz

250 Hz

TRUE ANSWER : ?
YOUR ANSWER : ?

Inductance of a coil Varies

Directly as the cross-sectional area of magnetic core

None of the listed here

Inversely as the length of the iron path

Both of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

Capacitors for power factor correction are rated in

kVAR

kW

kV

kVA

TRUE ANSWER : ?
YOUR ANSWER : ?

The voltage of domestic supply is 220 V. This figure represents

R.m.s. value

Average value

Peak value

Mean value

TRUE ANSWER : ?
YOUR ANSWER : ?

For a sine wave with peak value Emax ___________ the average value is

None of the listed here

0.636 Emax

0.434 Emax

0.707 Emax

TRUE ANSWER : ?
YOUR ANSWER : ?

Power factor of the following circuit will be zero

Resistance

Both of the listed here

Inductance

Capacitance

TRUE ANSWER : ?
YOUR ANSWER : ?

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