Current Electricity – Online MCQs – Physics 10th

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

Ωm

Ωm^–1

Ω^–1

2. The resistance of a metal increases with increasing temperature because:

the number of conduction electrons decreases

the number of conduction electrons increases

the collisions of the conducting electrons with the increase of the electron

the collisions of the conducting electrons with the lattice consisting of the ions of the metal increase

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

increased with a rise in temperature

zero

the same

decreased with a rise in temperature

4. S.I unit of EMF is:

ampere

J / C

statvolt

volt

5. In an electric circuit a voltmeter is always connected in:

parallel

mixed

series

none of these

6. When a charge moves through a potential difference,

electrical work is done and energy transferred

electrical work is not done and but energy is transferred

neither electric work is done nor energy transferred

electrical work is done and but energy does not transfer

7. The S.I unit of electric current is:

volt

N / C

ampere

Coulomb

8. Which of the following is NOT equivalent to watt?

amperes/volt

joules/sec

amperes x ohm

amperes x volts

9. In a centimetre-gram-second (CCS) system the unit of EMF is:

volt

statvolt

ampere

J / C

10. The ratio between the voltage applied to the current flowing through a circuit is called:

inductance

capacitance

resistance

conductance

11. Ohm’s law states that:

resistance increases as current increases

resistance increases as voltage increases

resistance decreases as current increases

current increases as voltage increases

12. Conductance is reciprocal of:

current

resistance

permittivity of free space

capacitance

13. Which of the following is the purpose of connecting a battery in an electric circuit?

To vary the resistance across the conductor

To maintain a constant potential difference across the conductor

To maintain a varying potential difference across the conductor

To maintain resistance across the conductor

14. In the series combination of two or more resistances:

neither current nor voltage through each resistance is the same

the voltage through each resistance is the same

both current and voltage through each resistance are the same

the current through each resistance is the same

15. Most power stations in our country produce:

conventional current

None of them

alternating current

direct current

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

positive charge of the conductor

All of them

negative charges of the conductor

neutral particles of the conductor

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

parallel

series

mixed

none of the above

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

None of them

alternating current

conventional current

direct current

19. It is an electrical component that converts one form of energy int another form of energy.

Transducer

Resistor

LDR

Battery

20. 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 mho (Ω^–1) and it is equal to R.

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

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

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