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

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Question 1 of 20

Physics

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

1.Copper

2.Platinum

3.Silver

4.Aluminium

Question 1 of 20

Question 2 of 20

2. 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 2 of 20

Question 3 of 20

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

1.Increases

2.Decreases

3.Does not change

4.None of these

Question 3 of 20

Question 4 of 20

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

4.R is a proportionality constant

Question 4 of 20

Question 5 of 20

5. 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 5 of 20

Question 6 of 20

6. The first battery made in 1800 consisted of:

1.Zinc plates only

2.Copper and zinc plates soaked in saltwater

3.Copper and zinc plates

4.Copper plates only

Question 6 of 20

Question 7 of 20

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

1.Directly proportional

2.Not equal

3.Inversely proportional

4.Equal

Question 7 of 20

Question 8 of 20

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

1.Free electrons

2. Protons only

3.Neutrons

4.x-rays

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. 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 10 of 20

Question 11 of 20

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

1.14.5 W

2.60 W

3.30 W

4.4.8 W

Question 11 of 20

Question 12 of 20

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

1.Both a and b

2.Power

3.Current

4.Resistance

Question 12 of 20

Question 13 of 20

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

1.Negative ions

2.Positive ions

3.Positive charges

4.Free electrons

Question 13 of 20

Question 14 of 20

14. The unit of current in known as:

1.Volt

2.Electron

3.Ohm

4.Ampere

Question 14 of 20

Question 15 of 20

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

1.Different

2.Not the same

3.The same

4.Zero

Question 15 of 20

Question 16 of 20

16. 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 16 of 20

Question 17 of 20

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

1.Only negative charge

2.Both positive and negative charge

3.None of these

4.Only positive 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 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 19 of 20

Question 20 of 20

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

1.Doubles

2.Quarter

3.Remains unchanged

4.Halves

Question 20 of 20

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