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

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Question 1 of 20

Physics

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

1.Not the same

2.Different

3.Zero

4.The same

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:

1.12 Ω

2.4 Ω

3.2 Ω

4.8 Ω

Question 2 of 20

Question 3 of 20

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

1.36V

2.2V

3.18V

4.9V

Question 3 of 20

Question 4 of 20

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

1.Free electrons

2.Negative ions

3.Positive charges

4.Positive ions

Question 4 of 20

Question 5 of 20

5. 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 5 of 20

Question 6 of 20

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

1.Silver

2.Copper

3.Platinum

4.Aluminium

Question 6 of 20

Question 7 of 20

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

1.Remains the same

2.Increases

3.Cannot be predicted

4.Decreases

Question 7 of 20

Question 8 of 20

8. 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 8 of 20

Question 9 of 20

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

1.Does not change

2.Increases

3.None of these

4.Decreases

Question 9 of 20

Question 10 of 20

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

1.Free electrons

2. Protons only

3.Neutrons

4.x-rays

Question 10 of 20

Question 11 of 20

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

1.Inversely proportional

2.Directly proportional

3.Equal

4.Not equal

Question 11 of 20

Question 12 of 20

12. The unit of current in known as:

1.Electron

2.Volt

3.Ohm

4.Ampere

Question 12 of 20

Question 13 of 20

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

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

2.To decrease the resistance of the circuit

3.To increase the resistance of the circuit

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

Question 13 of 20

Question 14 of 20

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

1.Both a and b

2.Current

3.Resistance

4.Power

Question 14 of 20

Question 15 of 20

15. The equivalent resistance of a parallel combination is:

1.None of these

2.Is greater than the larger resistance of the combination

3.Is smaller than the smallest resistance of the combination

4.Equal to the sum of all the resistance

Question 15 of 20

Question 16 of 20

16. 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

3.4.8 W

4.30 W

Question 16 of 20

Question 17 of 20

17. 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 17 of 20

Question 18 of 20

18. 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 18 of 20

Question 19 of 20

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

1.R is a proportionality constant

2.R is called the resistance of conductor

3.The value of R is different for different conductors

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

Question 19 of 20

Question 20 of 20

20. The first battery made in 1800 consisted of:

1.Copper and zinc plates soaked in saltwater

2.Zinc plates only

3.Copper plates only

4.Copper and zinc plates

Question 20 of 20

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