Current Electricity – Online MCQs – Physics 10th

1. Reciprocal of resistivity is called:

resistance

conductivity

current

capacitance

2. Ohm’s law states that:

resistance increases as voltage increases

resistance increases as current increases

resistance decreases as current increases

current increases as voltage increases

3. The property of a body to oppose the flow of electric charge through it is called electric ___________.

conductance

resistance

capacitance

potential

4. If the temperature of a metallic conductor increases, electrical resistance will:

decrease

become zero

remain the same

increase

5. A current that always flows in one direction only is called:

direct current

conventional current

None of them

alternating current

6. When a charge moves through a potential difference,

electrical work is not done and but energy is transferred

neither electric work is done nor energy transferred

electrical work is done and energy transferred

electrical work is done and but energy does not transfer

7. Ohm’s law can be applied directly to:

inductor circuits

None of them

capacitor and inductor circuits

capacitor circuits

8. The resistivity of the material ρ is measured in:

Ωm

Ω^–1

Ωm^–1

9. Two resistances of 6 Ω and 12 Ω are connected in parallel. Their net resistance is:

50 Ω

6 Ω

7 Ω

60 Ω

10. The resistance of a wire on increasing its temperature will be:

the same

zero

decreased with a rise in temperature

increased with a rise in temperature

11. An instrument which detects electric current is known as:

voltmeter

resistor

transducer

galvanometer

12. In an electric circuit an ammeter is always connected in:

none of the above

mixed

parallel

series

13. Which statement is TRUE for the conductance of a conductor (K)?

Its unit is the Ohm (Ω) and it is equal to R.

Its unit is Ohm (Ω) and it is equal to 1/R.

Its unit is mho (Q^–1) and it is equal to 1/R.

Its unit is mho (Ω^–1) and it is equal to R.

14. The length of g conductor is halved. Its resistance will be:

halved

the same

zero

doubled

15. An electric current is always considered as the flow of:

All of them

positive charge of the conductor

negative charges of the conductor

neutral particles of the conductor

16. A current that reverses its direction periodically is called:

alternating current

None of them

direct current

conventional current

17. Equation of power dissipation in resistors is:

None of these

P = IV

V² / R

both of these

18. The (K) in Ohm’s law (I = KV) indicated the:

Coulomb’s constant

conductance

None of these

resistance

19. Which statement is TRUE for an electric current?

It sometimes obeys the law of vector addition

It does not have a direction

it does not obey the law of vector addition

it always obeys the law of vector addition.

20. The resistance of a conductor depends upon:

the dimension of the conductor

the physical state of the conductor

All of these

nature of the conductor

Online MCQs Test | Unit 15 : Current Electricity | Physics Class 10th | Sindh Board Science Group