ELECTRIC CIRCUITS QUIZ

What is called the instantaneous value of an alternating current?

The value of peak quantity at any instant.

The value of alternating frequency at any instant.

The value of alternating quantity at any instant.

The value of peak current at any instant.

TRUE ANSWER : ?
YOUR ANSWER : ?

The ratio of the resistance of a 200 W, 230 V lamp to that of a 100 W, 115 V lamp will be

2.

0.25.

0.5.

4.

TRUE ANSWER : ?
YOUR ANSWER : ?

Energy efficiency during electroplating is usually in the range

85 to 90%.

50 to 80%.

80 to 85%.

90 to 99%.

TRUE ANSWER : ?
YOUR ANSWER : ?

An electrical circuit with 10 branches and 7 nodes will have

10 loop equations.

7 loop equations.

3 loop equations.

4 loop equations.

TRUE ANSWER : ?
YOUR ANSWER : ?

Efficiency of electrical machines should be calculated by measuring

losses and input.

output and input.

losses.

losses and output.

TRUE ANSWER : ?
YOUR ANSWER : ?

Which battery is used in aeroplanes?

None of them.

Dry cell battery.

Lead acid battery.

Edission cell.

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of following is not a vector?

Electric field.

Electric potential.

Linear momentum.

Angular momentum.

TRUE ANSWER : ?
YOUR ANSWER : ?

A coil of negligible resistance has an induction of 100 mH. The current passing through the coil changes from 2 A to 4 A at a uniform rate in 0.1 sec the voltage across the coil during this time would be __________ V.

8

2

50

36

TRUE ANSWER : ?
YOUR ANSWER : ?

The capacitance of a conductor is varying from 2 microfarad to zero in 1 sec linearly if the voltage applied to it is 6 V the energy stored in 0.5 sec in the condenser is

10 µ joules.

18 µ joules.

20 µ joules.

55.1 µ joules.

TRUE ANSWER : ?
YOUR ANSWER : ?

Two resistors R1 and R2 give combined resistance of 4.5 Ohm when connected in series and 1 Ohm when in parallel, the resistances are

1.25 Ohm and 3.25 Ohm.

1.5 Ohm and 3 Ohm.

2 Ohm and 2.5 Ohm.

2.2 Ohm and 2.3 Ohm.

TRUE ANSWER : ?
YOUR ANSWER : ?

↑