electrical

Basic Electrical Engineering MCQ Questions With Answers Page - 2

1.

For which of the following ‘ampere second’ could be the unit?

Answer/ Hint      

Answer : B

Explanation :

2.

All of the following are equivalent to watt except

Answer/ Hint      

Answer : D

Explanation :

3.

A resistance having rating 10 ohms, 10 W is likely to be a

Answer/ Hint      

Answer : C

Explanation :

4.

Which of the following does not have negative temperature co-efficient?

Answer/ Hint      

Answer : A

Explanation :

5.

Varistors are

Answer/ Hint      

Answer : B

Explanation :

6.

Insulating materials have the function of

Answer/ Hint      

Answer : A

Explanation :

7.

The rating of a fuse wire is always expressed in

Answer/ Hint      

Answer : D

Explanation :

8.

The minimum charge on an ion is

Answer/ Hint      

Answer : B

Explanation :

9.

In a series circuit with unequal resistances

Answer/ Hint      

Answer : D

Explanation :

10.

The filament of an electric bulb is made of

Answer/ Hint      

Answer : C

Explanation :

11.

A 3Ω resistor having 2A current will dissipate the power of

Answer/ Hint      

Answer : C

Explanation :

12.

Which of the following statement is true?

Answer/ Hint      

Answer : C

Explanation :

13.

The resistance of a few meters of wire conductor in closed electrical circuit is

Answer/ Hint      

Answer : A

Explanation :

14.

If a parallel circuit is opened in the main line, the current

Answer/ Hint      

Answer : C

Explanation :

15.

If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes

Answer/ Hint      

Answer : A

Explanation :

16.

Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open

Answer/ Hint      

Answer : D

Explanation :

17.

Two resistance  R1 and R2  are connected in series across the voltage source where  R2  > R1. The largest drop will be across

Answer/ Hint      

Answer : A

Explanation :

18.

What will be energy used by the battery if the battery has to drive 6.28 × 1018 electrons with potential difference of 20 V across the terminal?

Answer/ Hint      

Answer : D

Explanation :

19.

A closed switch has a resistance of

Answer/ Hint      

Answer : A

Explanation :

20.

The hot resistance of the bulb’s filament is higher than its cold resistance because the temperature co-efficient of the filament is

Answer/ Hint      

Answer : C

Explanation :

21.

Heat in a conductor is produced on the passage of electric current due to

Answer/ Hint      

Answer : D

Explanation :

22.

The insulation on a current carrying conductor is provided

Answer/ Hint      

Answer : C

Explanation :

23.

The thickness of insulation provided on the conduct depends on

Answer/ Hint      

Answer : A

Explanation :

24.

Which of the following quantities remain the same in all parts of a series circuit?

Answer/ Hint      

Answer : B

Explanation :

25.

A 40 W bulb is connected in series with a room heater. If now  40 W  bulb is replaced by  100 W  bulb, the heater output will

Answer/ Hint      

Answer : B

Explanation :

26.

A 500 W, 220 V bulb is supplied with 110V. power consumption by the bulb will be

Answer/ Hint      

Answer : B

Explanation :

27.

In an electric kettle water boils in 10 minutes. It is required to boil the boiler in 15 min, using the same supply mains

Answer/ Hint      

Answer : A

Explanation :

28.

An electric filament bulb can be worked from

Answer/ Hint      

Answer : D

Explanation :

29.

Resistance of a tungsten lamp  _____________  as applied voltage increases

Answer/ Hint      

Answer : B

Explanation :

30.

Electric current passing through the circuit produces

Answer/ Hint      

Answer : D

Explanation :

31.

Resistance of a material always decrease if

Answer/ Hint      

Answer : C

Explanation :

32.

If the efficiency of a machine is to be high, what should be low?

Answer/ Hint      

Answer : B

Explanation :

33.

When electric current passes through a metallic conductor, its temperature rises. This is due to

Answer/ Hint      

Answer : A

Explanation :

34.

Two bulbs of  500 W and 200 W rated at  250 V  will have resistance ratio as

Answer/ Hint      

Answer : C

Explanation :

35.

A glass rod when rubbed with silk cloth is charged because

Answer/ Hint      

Answer : C

Explanation :

36.

Whether circuit may be  AC or DC  one, following most effective in reducing the magnitude of the current.

Answer/ Hint      

Answer : D

Explanation :

37.

It becomes more difficult to remove

Answer/ Hint      

Answer : D

Explanation :

38.

A thermistor has

Answer/ Hint      

Answer : B

Explanation :

39.

Nichrome wire is an alloy of

Answer/ Hint      

Answer : C

Explanation :

40.

When a voltage of one volt is applied, a circuit allows one microampere current to flow through it. The conductance of the circuit is

Answer/ Hint      

Answer : A

Explanation :

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