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

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Question 1 of 20

Physics

1. The first battery made in 1800 consisted of:

1.Copper plates only

2.Copper and zinc plates soaked in saltwater

3.Zinc plates only

4.Copper and zinc plates

Question 1 of 20

Question 2 of 20

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

1.18V

2.36V

3.9V

4.2V

Question 2 of 20

Question 3 of 20

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

1.Free electrons

2.Positive ions

3.Negative ions

4.Positive charges

Question 3 of 20

Question 4 of 20

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

1.Increases

2.Remains the same

3.Decreases

4.Cannot be predicted

Question 4 of 20

Question 5 of 20

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

1.To increase the resistance of the circuit

2.To decrease the resistance of the circuit

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

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

Question 5 of 20

Question 6 of 20

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

1.Decreases

2.Does not change

3.Increases

4.None of these

Question 6 of 20

Question 7 of 20

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

1.Silver

2.Platinum

3.Copper

4.Aluminium

Question 7 of 20

Question 8 of 20

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

1.Neutrons

2. Protons only

3.x-rays

4.Free electrons

Question 8 of 20

Question 9 of 20

9. Electric potential and e.m.f:

1.Have different unit

2.Are the different terms

3.Both b and c

4.Are the same terms

Question 9 of 20

Question 10 of 20

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

1.Halves

2.Quarter

3.Remains unchanged

4.Doubles

Question 10 of 20

Question 11 of 20

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

1.R is called the resistance of conductor

2.The value of R is different for different conductors

3.R is a proportionality constant

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

Question 11 of 20

Question 12 of 20

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

1.Zero

2.Different

3.The same

4.Not the same

Question 12 of 20

Question 13 of 20

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

1.Resistance

2.Current

3.Power

4.Both a and b

Question 13 of 20

Question 14 of 20

14. The unit of current in known as:

1.Electron

2.Ampere

3.Volt

4.Ohm

Question 14 of 20

Question 15 of 20

15. Which is not true?

1.1 m A = 1 c 10³ ohm

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

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

4.1 mega ohm = 1 x 10⁶ ohm

Question 15 of 20

Question 16 of 20

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

1.Inversely proportional

2.Equal

3.Not equal

4.Directly proportional

Question 16 of 20

Question 17 of 20

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

1.Only positive charge

2.None of these

3.Only negative charge

4.Both positive and negative charge

Question 17 of 20

Question 18 of 20

18. 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

2.12 Ω

3.2 Ω

4.8 Ω

Question 18 of 20

Question 19 of 20

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

1.30 W

2.14.5 W

3.4.8 W

4.60 W

Question 19 of 20

Question 20 of 20

20. 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.Is smaller than the smallest resistance of the combination

4.None of these

Question 20 of 20

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