Electrical Engineering Mcqs Practice Test

Question 1

In a lamp load when more than one lamp are switched on the total resistance of the load_____________?

Accepted Answer

B. decreases

Question 2

When one leg of parallel circuit is opened out the total current will______________?

Accepted Answer

C. decrease

Question 3

It becomes more difficult to remove_________________?

Accepted Answer

D. third electron from the orbit

Question 4

Whether circuit may be AC.  or D. C.  one, following is most effective in reducing the magnitude of the current?

Accepted Answer

D. Resistor

Question 5

A glass rod when rubbed with silk cloth is charged because__________?

Accepted Answer

C. it gives away electrons

Question 6

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

Accepted Answer

C. 2 : 5

Question 7

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

Accepted Answer

A. collisions between conduction electrons and atoms

Question 8

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

Accepted Answer

B. Losses

Question 9

Resistance of a material always decreases if___________?

Accepted Answer

C. number of free electrons available become more

Question 10

Electric current passing through the circuit produces_____________?

Accepted Answer

E. all above effects

Question 11

An electric filament bulb can be worked from____________?

Accepted Answer

D. All above

Question 12

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

Accepted Answer

A. length of heating element should be decreased

Question 13

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__________

Accepted Answer

B. increase

Question 14

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

Accepted Answer

B. Current

Question 15

The thickness of insulation provided on the conductor depends on_____________?

Accepted Answer

A. the magnitude of voltage on the conductor

Question 16

The insulation on a current carrying conductor is provided__________?

Accepted Answer

C. both of above factors

Question 17

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

Accepted Answer

C. positive

Question 18

A closed switch has a resistance of_____________?

Accepted Answer

A. zero

Question 19

Two resistances Rl and Ri are connected in series across the voltage source where Rl>Ri. The largest drop will be across______________?

Accepted Answer

A. Rl

Question 20

The four bulbs of 40 W each are connected in series swift a battery across them, which of the following statement is true_______________?

Accepted Answer

A. The current through each bulb in same