ELECTRIC CIRCUITS QUIZ

The unit of resistivity is

Ω / metre.

Ω - metre.

Ω / m².

Ω.

TRUE ANSWER : ?
YOUR ANSWER : ?

In which braking back emf exceeds supply voltage?

Regenerative.

Plugging.

None of these.

Dynamic.

TRUE ANSWER : ?
YOUR ANSWER : ?

A piece of copper and another piece of germanium are cooled from room temperature to 80K. The resistance of

copper decreases and germanium increases.

copper increases and germanium decreases.

each of them increases.

each of them decreases.

TRUE ANSWER : ?
YOUR ANSWER : ?

For the circuit given in the figure the power delivered by the 2 V source is given by

- 2 W.

2 W.

- 4 W.

4 W.

TRUE ANSWER : ?
YOUR ANSWER : ?

Find the current through 5 Ohm resistor from A to B.

2A.

1A.

-1A.

-2A.

TRUE ANSWER : ?
YOUR ANSWER : ?

The mass of the atom is determined by

proton.

electron and proton.

electrons.

neutron and proton.

TRUE ANSWER : ?
YOUR ANSWER : ?

Total instantaneous power supplied by a 3 - φ AC supply to a balanced RL load is

pulsating with zero average.

pulsating with non zero average.

zero.

constant.

TRUE ANSWER : ?
YOUR ANSWER : ?

Resistance of which material does not change with change in temperature?

Platinum.

Metal alloys constantan and manganin.

Brass.

Tungsten.

TRUE ANSWER : ?
YOUR ANSWER : ?

Which part of magnetic path requires largest mmf?

Inductance.

Core.

Air gap.

Coil.

TRUE ANSWER : ?
YOUR ANSWER : ?

A 3 – φ delta connected symmetrical load consumes P Watts of power from a balanced supply. If the same load is connected in star to the same supply then what is the power consumption?

√3P.

P/3.

P.

3P.

TRUE ANSWER : ?
YOUR ANSWER : ?

↑