Study desk with books and learning tools for subject-based MCQ preparation

Focused topic practice

basic electrical MCQs

Practise focused basic electrical questions with marked answers for exam preparation and subject revision.

basic electrical Mcqs
1. How many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute?
comments icon0

A. 1200

B. 10

C. 600

D. 60

2. Which quantity consists of a unit 1KWh ?
comments icon0

A. Time

B. Charge

C. Power

D. Energy
3. The resistance of a few meters of wire conductor in closed electrical circuit is____________?
comments icon0
A. practically zero

B. high

C. low

D. very high

4. Instantaneous power in inductor is proportional to the
comments icon0

A. square of the rate of change of current.

B. emperature of the inductor.

C. square of instantaneous current.

D. product of the instantaneous current and rate of change of current.
5. Power dissipation in ideal inductor is
comments icon0

A. Minimum

B. A finite value

C. Zero

D. Maximum

6. Which is the best conductor of electricity _______________?
comments icon0

A. Iron

B. Silver

C. Copper

D. Carbon

7. With rise in temperature the resistance of semi-conductors_________________?
comments icon0
A. decreases

B. increases

C. remains constant

D. first increases and then decreases

8. A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is___________?
comments icon0
A. 800 Q

B. 600 Q

C. 400 Q

D. 1000 Q

9. For which of the following ampere second could be the unit ?
comments icon0
A. Charge

B. Energy

C. Reluctance

D. Power

10. An instrument which detects electric current is known as_____________?
comments icon0

A. wattmeter

B. rheostat

C. voltmeter

D. galvanometer
11. The four bulbs of 40 W each are connected in series swift a battery across them, which of the following statement is true_______________?
comments icon0
A. The current through each bulb in same

B. None of the above

C. The power dissipation in each bulb is not same

D. The voltage across each bulb is not same

12. The unit of resistivity is
comments icon0
A. ? metre.

B. ? / m.

C. ? / metre.

D. ?.

13. The substances which have a large number of free electrons and offer a low resistance are called____?
comments icon0
A. conductors

B. insulators

C. semi-conductors

D. inductors

14. Internal resistance of ideal current source is ?
comments icon0
A. infinite

B. zero

C. 100 ohms

D. finite

15. The resistance of a conductor varies inversely as___________?
comments icon0

A. length

B. area of cross-section

C. temperature

D. resistivity

16. If 1 A current flows in a circuit, the number of electrons flowing through this circuit is
comments icon0

A. 0.625 10-<sup>19</sup>

B. 0.625 1019

C. 1.6 10<sup>19</sup>

D. 1.6 10-<sup>19</sup>

17. Ohms law is not applicable to____________?
comments icon0

A. circuits with low current densities

B. high voltage circuits

C. vacuum tubes

D. carbon resistors

18. The voltage induced in an inductor is represented as,
comments icon0

A. product of its inductance and current through it.

B. product of its inductance and rate of change of current through it.

C. ratio of its inductance to the current through it.

D. ratio of the current through it to its inductance.

19. Out of the following which is not a poor conductor__________?
comments icon0

A. Cast iron

B. Tungsten

C. Carbon

D. Copper
20. Two resistors are said to be connected in series when___________?
comments icon0
A. same current passes in turn through both

B. both carry the same value of current

C. total current equals the sum of branch currents

D. sum of IR drops equals the applied e.m.f.