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.Zinc plates only

3.Copper and zinc plates soaked in saltwater

4.Copper and zinc plates

Question 1 of 20

Question 2 of 20

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

1.Does not change

2.Decreases

3.Increases

4.None of these

Question 2 of 20

Question 3 of 20

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

1.Only negative charge

2.Both positive and negative charge

3.Only positive charge

4.None of these

Question 3 of 20

Question 4 of 20

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

1.18V

2.2V

3.9V

4.36V

Question 4 of 20

Question 5 of 20

5. 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 current as the power source

3.To increase the resistance of the circuit

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

Question 5 of 20

Question 6 of 20

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

1.Both a and b

2.Resistance

3.Current

4.Power

Question 6 of 20

Question 7 of 20

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

1.The value of R is different for different conductors

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

3.R is called the resistance of conductor

4.R is a proportionality constant

Question 7 of 20

Question 8 of 20

8. The unit of current in known as:

1.Electron

2.Ohm

3.Ampere

4.Volt

Question 8 of 20

Question 9 of 20

9. The equivalent resistance of a parallel combination is:

1.Is greater than the larger resistance of the combination

2.Is smaller than the smallest resistance of the combination

3.Equal to the sum of all the resistance

4.None of these

Question 9 of 20

Question 10 of 20

10. Electric potential and e.m.f:

1.Are the same terms

2.Are the different terms

3.Have different unit

4.Both b and c

Question 10 of 20

Question 11 of 20

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

1.Directly proportional

2.Inversely proportional

3.Equal

4.Not equal

Question 11 of 20

Question 12 of 20

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

1.Negative ions

2.Positive ions

3.Positive charges

4.Free electrons

Question 12 of 20

Question 13 of 20

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

1.Silver

2.Copper

3.Platinum

4.Aluminium

Question 13 of 20

Question 14 of 20

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

1.Zero

2.Different

3.The same

4.Not the same

Question 14 of 20

Question 15 of 20

15. 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.Doubles

4.Halves

Question 15 of 20

Question 16 of 20

16. 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 16 of 20

Question 17 of 20

17. 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 17 of 20

Question 18 of 20

18. Which is not true?

1.1 mega ohm = 1 x 10⁶ 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 m A = 1 c 10³ ohm

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:

1.2 Ω

2.12 Ω

3.8 Ω

4.4 Ω

Question 19 of 20

Question 20 of 20

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

1. Protons only

2.Free electrons

3.x-rays

4.Neutrons

Question 20 of 20

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