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

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Question 1 of 20

Physics

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

1.18V

2.9V

3.2V

4.36V

Question 1 of 20

Question 2 of 20

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

1.R is a proportionality constant

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

3.R is called the resistance of conductor

4.The value of R is different for different conductors

Question 2 of 20

Question 3 of 20

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

1.Platinum

2.Aluminium

3.Copper

4.Silver

Question 3 of 20

Question 4 of 20

4. The first battery made in 1800 consisted of:

1.Copper plates only

2.Zinc plates only

3.Copper and zinc plates

4.Copper and zinc plates soaked in saltwater

Question 4 of 20

Question 5 of 20

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

1.Directly proportional

2.Not equal

3.Inversely proportional

4.Equal

Question 5 of 20

Question 6 of 20

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

1.Only positive charge

2.Both positive and negative charge

3.Only negative charge

4.None of these

Question 6 of 20

Question 7 of 20

7. The unit of current in known as:

1.Ampere

2.Volt

3.Electron

4.Ohm

Question 7 of 20

Question 8 of 20

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

1.4.8 W

2.30 W

3.60 W

4.14.5 W

Question 8 of 20

Question 9 of 20

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

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

2.To increase the resistance of the circuit

3.To decrease the resistance of the circuit

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

Question 9 of 20

Question 10 of 20

10. Which is not true?

1.1 mega ohm = 1 x 10⁶ ohm

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

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

4.1 m A = 1 c 10³ ohm

Question 10 of 20

Question 11 of 20

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

1.Neutrons

2. Protons only

3.Free electrons

4.x-rays

Question 11 of 20

Question 12 of 20

12. The equivalent resistance of a parallel combination is:

1.Is smaller than the smallest resistance of the combination

2.None of these

3.Equal to the sum of all the resistance

4.Is greater than the larger resistance of the combination

Question 12 of 20

Question 13 of 20

13. Electric potential and e.m.f:

1.Both b and c

2.Are the different terms

3.Have different unit

4.Are the same terms

Question 13 of 20

Question 14 of 20

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

1.The same

2.Different

3.Not the same

4.Zero

Question 14 of 20

Question 15 of 20

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

1.Cannot be predicted

2.Increases

3.Decreases

4.Remains the same

Question 15 of 20

Question 16 of 20

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

1.Remains unchanged

2.Quarter

3.Halves

4.Doubles

Question 16 of 20

Question 17 of 20

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

1.Both a and b

2.Power

3.Resistance

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.Free electrons

4.Positive ions

Question 18 of 20

Question 19 of 20

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

1.12 Ω

2.8 Ω

3.2 Ω

4.4 Ω

Question 19 of 20

Question 20 of 20

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

1.Does not change

2.Increases

3.Decreases

4.None of these

Question 20 of 20

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