Punjab 10th Class Physics Chapter 5 Current Electricity Mcqs Test Online

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Question 1 of 20

Physics

1. What is the power rating of a lamp connected to a 12 V source when it carries 2.5A?

1.60 W

2.14.5 W

3.30 W

4.4.8 W

Question 1 of 20

Question 2 of 20

2. The combined resistance of two identical resistors, connected in series is 8 Ω. Their combined resistance in a parallel arrangement will be:

1.4 Ω

2.8 Ω

3.12 Ω

4.2 Ω

Question 2 of 20

Question 3 of 20

3. Current Flows through the filament of bulb due to:

1.Free electrons

2.x-rays

3. Protons only

4.Neutrons

Question 3 of 20

Question 4 of 20

4. What happens to the intensity or the brightness of the lamps are added:

1.Cannot be predicted

2.Decreases

3.Increases

4.Remains the same

Question 4 of 20

Question 5 of 20

5. Which statement is not true? In the equation V = IR:

1.R is called the resistance of conductor

2.R is a proportionality constant

3.The value of R is the same for every conductor

4.The value of R is different for different conductors

Question 5 of 20

Question 6 of 20

6. The unit of current in known as:

1.Ampere

2.Volt

3.Electron

4.Ohm

Question 6 of 20

Question 7 of 20

7. When resistances are connected in series, the current passing through them is:

1.Zero

2.Not the same

3.Different

4.The same

Question 7 of 20

Question 8 of 20

8. The equivalent resistance of a parallel combination is:

1.Is greater than the larger resistance of the combination

2.Equal to the sum of all the resistance

3.None of these

4.Is smaller than the smallest resistance of the combination

Question 8 of 20

Question 9 of 20

9. Which is not true?

1.The property which opposes the flow of current through a conductor is called its resistance

2.1 m A = 1 c 10³ ohm

3.1 mega ohm = 1 x 10⁶ ohm

4.The value of R (resistance) is different for each conductor

Question 9 of 20

Question 10 of 20

10. In electrolytes, the flow of current is due to:

1.Only positive charge

2.Only negative charge

3.Both positive and negative charge

4.None of these

Question 10 of 20

Question 11 of 20

11. Why should household appliances be connected in parallel with the voltage source?

1.To decrease the resistance of the circuit

2.To provide each appliance the same voltage as the power source

3.To provide each appliance the same current as the power source

4.To increase the resistance of the circuit

Question 11 of 20

Question 12 of 20

12. If we double both the current and the voltage in a circuit while keeping its resistance constant, the power:

1.Halves

2.Doubles

3.Quarter

4.Remains unchanged

Question 12 of 20

Question 13 of 20

13. Which of the following has the lowest specific resistance?

1.Silver

2.Platinum

3.Aluminium

4.Copper

Question 13 of 20

Question 14 of 20

14. The resistance of a wire is _____________ to its cross-section area:

1.Not equal

2.Equal

3.Inversely proportional

4.Directly proportional

Question 14 of 20

Question 15 of 20

15. Electric potential and e.m.f:

1.Are the different terms

2.Are the same terms

3.Have different unit

4.Both b and c

Question 15 of 20

Question 16 of 20

16. What is the voltage across a 6 Ω resistor when 3A of current passes through it?

1.2V

2.36V

3.9V

4.18V

Question 16 of 20

Question 17 of 20

17. When we double the voltage in a simple electric circuit, we double the:

1.Power

2.Resistance

3.Both a and b

4.Current

Question 17 of 20

Question 18 of 20

18. An electric current in conductors is due to the flow of:

1.Positive charges

2.Negative ions

3.Positive ions

4.Free electrons

Question 18 of 20

Question 19 of 20

19. The first battery made in 1800 consisted of:

1.Copper and zinc plates soaked in saltwater

2.Copper plates only

3.Zinc plates only

4.Copper and zinc plates

Question 19 of 20

Question 20 of 20

20. As the temperature of a conductor rises, its resistance:

1.None of these

2.Increases

3.Decreases

4.Does not change

Question 20 of 20

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