26. The charge flowing in a conductor varies with time as: q = αt +1/2 βt2 + 16 γt3 Where α, β, γ are positive constants. Then the initial current (l) is given by the condition :

Correct Answer is: None of these

Current Electricity MCQ Multiple Choice Questions Answers

Q: 3. A carbon resistance is having a following coding green, orange, black, gold. The resistance of resistor is

Correct Answer is: 53 x 10 ± 10%

Q: 5. A steady current flows in a metallic conductor of non-uniform cross-section. The quantities/quantity constant along the length of the conductor is/are

Correct Answer is: Current and drift speed

Q: 11. By increasing the temperature, the specific resistance of a conductor and semiconductor

Correct Answer is: Decreases for both

Q: 13. For a metallic wire, the ratio V/i (V = the applied potential difference, i = current flowing) is

Correct Answer is: Increases or decreases as temperature rises, depending upon the metal

Q: 16. In a potentiometer of 10 wires, the balance point is obtained on the 7th wire. To shift the balance point to 9th wire, we should

Correct Answer is: decrease resistance in series with the cell whose emf is to be measured.

Q: 17. In a Wheatstone bridge if the battery and galvanometer are interchanged then the deflection in galvanometer will

Correct Answer is: none of these.

Current Electricity MCQs are essential practice tools for students and exam aspirants. These multiple-choice questions help reinforce key concepts and prepare you for various assessments and competitive exams.

About Current Electricity MCQ Questions

Current Electricity MCQs cover fundamental concepts such as electric current, resistance, Ohm's Law, and Kirchhoff's Laws. They also delve into practical applications and problem-solving techniques, ensuring a comprehensive understanding of the subject.

Why Practice Current Electricity Objective Questions?

Practicing Current Electricity MCQs offers several benefits. They help in reinforcing your understanding of key concepts, preparing for school and college exams, and enhancing your problem-solving skills. They are also useful for competitive exams and job interviews, where a strong grasp of electrical principles is crucial.

Who Should Use These MCQs?

Current Electricity MCQ Questions for Practice

1. If a power of 100 watt is being supplied across a potential difference of 200 V, current flowing is

2A
0.5 A
4.1666666666666664E-2
20 A

2. A 5A fuse wire can with stand a maximum power of 1W in circuit. The resistance of the fuse wire is:

0.2 Ω
5 Ω
0.4 Ω
0.04 Ω

3. A carbon resistance is having a following coding green, orange, black, gold. The resistance of resistor is

53 x 10⁰ ± 5%
53 x 10¹ ± 5%
53 x 10⁰ ± 10%
53 x 10 ± 10%

4. A cell of emf E is connected with an external resistance R, then p.d. across cell is V. The internal resistance of cell will be

(E-V)R/E
(E-V)R/V
(V-E)R/V
(V-E)R/E

5. A steady current flows in a metallic conductor of non-uniform cross-section. The quantities/quantity constant along the length of the conductor is/are

Current, electric field and drift speed
Drift speed only
Current and drift speed
Current only

6. A uniform w ire connected across a supply produces heat H per second. If wire is cut into three equal parts and all the parts are connected in parallel across the same supply, the heat produced per second will be :

7. A wire of resistance 3 Ω is cut into three pieces, which are then joined to form a triangle. The equivalent resistance between any corners of the triangle is :

2/3 Ω
3/2 Ω
1/2 Ω
1/3 Ω

8. An electric heater is connected to the voltage supply. After few seconds, current gets its steady value then its initial current will be

equal to its steady current
slightly higher than its steady current
slightly less than its steady current
zero

9. An electric heating element consumes 500 W, when connected to a 100 V line. If the line voltage becomes 150 V, the power consumed Will be:

500 W
750 W
1000 W
1125 W

10. At what temperature will the resistance of a copper wire become three times its value at 0⁰C? (Temperature coefficient of resistance for copper = 4 x 10^-3 per^oC)

400^oC
450^oC
500^oC
550^oC

11. By increasing the temperature, the specific resistance of a conductor and semiconductor

Increases for both
Decreases for both
Increases, decreases
Decreases for both

12. Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10 ? when a potential difference of 20 V is applied between its ends

120 C
240 C
20 C
4C

13. For a metallic wire, the ratio V/i (V = the applied potential difference, i = current flowing) is

Independent of temperature
Increases as the temperature rises
Decreases as the temperature rises
Increases or decreases as temperature rises, depending upon the metal

14. If a certain piece of copper is to be shaped into a conductor of minimum resistance, its length (L) and cross-sectional area shall respectively be :

L, 2A
L/2, 2A
2L, 2A
2l, A/2

15. If n cells each of emf e and internal resistance r are connected in parallel, then the total emf and internal resistance will be

ε, r/n
ε, nr
n ε, r/n
n ε, nr

16. In a potentiometer of 10 wires, the balance point is obtained on the 7th wire. To shift the balance point to 9th wire, we should

decrease resistance in the main circuit.
increase resistance in the main circuit.
decrease resistance in series with the cell whose emf is to be measured.
increase resistance in series with the cell whose emf is to be determined.

17. In a Wheatstone bridge if the battery and galvanometer are interchanged then the deflection in galvanometer will

change in previous direction
not change
change in opposite direction
none of these.

18. In a Wheatstoneâ€˜s bridge all the four arms have equal resistance R. If the resistance of the galvanometer arm is also R, the equivalent resistance of the combination as seen by the battery is

19. In an experiment with potentiometer, null point with a cell is found at 240 cm. When the cell is shunted with a resistance 2 Ω, the null point becomes 120 cm internal resistance of cell is :

4 Ω
2 Ω
1 Ω
12 Ω

20. In an experiment with potentiometer, null point with a cell is found at 240 cm. When the cell is shunted with a resistance 2 Ω, the null point becomes 120 cm internal resistance of cell is :

4 Ω
2 Ω
1 Ω
12 Ω

21. In parallel combination of n cells, we obtain

more voltage
more current
less voltage
less current

22. Kirchhoffs first and second laws for electrical circuits are consequences of:

conservation of energy
conservation of electrical charge and energy respectively
conservation of electric charge
neither conservation of energy nor electric charge

23. Kirchoffâ€˜s first and second laws in the electricity are the laws respectively of

Energy and Momentum conservation
Momentum and charge conservation
Mass and charge conservation
Charge and energy conservation

24. Siemen is the unit of:

resistance
conductance
specific conductance
None of these

25. Suppose H1 is the heat generated per second in the filament of a 100 W, 250 V lamp and H2 is the heat generated in the filament of a 200 W, 250 V lamp. Then H1/H2 is equal to:

1
2
2-Jan
4-Jan

26. The charge flowing in a conductor varies with time as: q = αt +1/2 βt² + 16 γt3 Where α, β, γ are positive constants. Then the initial current (l) is given by the condition :

l = α
l = α²
l = α^-1
None of these

27. The drift velocity does not depend upon

Cross-section of the wire
Length of the wire
Number of free electrons
Magnitude of the current

28. The electric resistance of a certain wire of iron is R. If its length and radius are both doubled, then

The resistance will be halved and the specific resistance will be doubled
The resistance and the specific resistance, will both remain unchanged
The resistance will be doubled and the specific resistance will be halved
The resistance will be halved and the specific resistance will remain unchanged

29. The example of a non-ohmic resistance is:

copper wire
fi lament lamp
carbon resistor
diode

30. The internal resistance of a cell of emf 12 V is 5 x 10^-2C Ω. It is connected across an unknown resistance. Voltage across the cell, when a current of 60 A is drawn from it, is

15 V
12 V
9 V
6 V

Current Electricity MCQ Multiple Choice Questions Answers | Quiz for Practice

About Current Electricity MCQ Questions

Why Practice Current Electricity Objective Questions?

Who Should Use These MCQs?

Current Electricity MCQ Questions for Practice

1. If a power of 100 watt is being supplied across a potential difference of 200 V, current flowing is

2. A 5A fuse wire can with stand a maximum power of 1W in circuit. The resistance of the fuse wire is:

3. A carbon resistance is having a following coding green, orange, black, gold. The resistance of resistor is

4. A cell of emf E is connected with an external resistance R, then p.d. across cell is V. The internal resistance of cell will be

5. A steady current flows in a metallic conductor of non-uniform cross-section. The quantities/quantity constant along the length of the conductor is/are

6. A uniform w ire connected across a supply produces heat H per second. If wire is cut into three equal parts and all the parts are connected in parallel across the same supply, the heat produced per second will be :

7. A wire of resistance 3 Ω is cut into three pieces, which are then joined to form a triangle. The equivalent resistance between any corners of the triangle is :

8. An electric heater is connected to the voltage supply. After few seconds, current gets its steady value then its initial current will be

9. An electric heating element consumes 500 W, when connected to a 100 V line. If the line voltage becomes 150 V, the power consumed Will be:

10. At what temperature will the resistance of a copper wire become three times its value at 0⁰C? (Temperature coefficient of resistance for copper = 4 x 10^-3 per^oC)

11. By increasing the temperature, the specific resistance of a conductor and semiconductor

12. Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10 ? when a potential difference of 20 V is applied between its ends

13. For a metallic wire, the ratio V/i (V = the applied potential difference, i = current flowing) is

14. If a certain piece of copper is to be shaped into a conductor of minimum resistance, its length (L) and cross-sectional area shall respectively be :

15. If n cells each of emf e and internal resistance r are connected in parallel, then the total emf and internal resistance will be

16. In a potentiometer of 10 wires, the balance point is obtained on the 7th wire. To shift the balance point to 9th wire, we should

17. In a Wheatstone bridge if the battery and galvanometer are interchanged then the deflection in galvanometer will

18. In a Wheatstoneâ€˜s bridge all the four arms have equal resistance R. If the resistance of the galvanometer arm is also R, the equivalent resistance of the combination as seen by the battery is

19. In an experiment with potentiometer, null point with a cell is found at 240 cm. When the cell is shunted with a resistance 2 Ω, the null point becomes 120 cm internal resistance of cell is :

20. In an experiment with potentiometer, null point with a cell is found at 240 cm. When the cell is shunted with a resistance 2 Ω, the null point becomes 120 cm internal resistance of cell is :

21. In parallel combination of n cells, we obtain

22. Kirchhoffs first and second laws for electrical circuits are consequences of:

23. Kirchoffâ€˜s first and second laws in the electricity are the laws respectively of

24. Siemen is the unit of:

25. Suppose H1 is the heat generated per second in the filament of a 100 W, 250 V lamp and H2 is the heat generated in the filament of a 200 W, 250 V lamp. Then H1/H2 is equal to:

26. The charge flowing in a conductor varies with time as: q = αt +1/2 βt² + 16 γt3 Where α, β, γ are positive constants. Then the initial current (l) is given by the condition :

27. The drift velocity does not depend upon

28. The electric resistance of a certain wire of iron is R. If its length and radius are both doubled, then

29. The example of a non-ohmic resistance is:

30. The internal resistance of a cell of emf 12 V is 5 x 10^-2C Ω. It is connected across an unknown resistance. Voltage across the cell, when a current of 60 A is drawn from it, is

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Current Electricity MCQ Multiple Choice Questions Answers | Quiz for Practice

About Current Electricity MCQ Questions

Why Practice Current Electricity Objective Questions?

Who Should Use These MCQs?

Current Electricity MCQ Questions for Practice

1. If a power of 100 watt is being supplied across a potential difference of 200 V, current flowing is

2. A 5A fuse wire can with stand a maximum power of 1W in circuit. The resistance of the fuse wire is:

3. A carbon resistance is having a following coding green, orange, black, gold. The resistance of resistor is

4. A cell of emf E is connected with an external resistance R, then p.d. across cell is V. The internal resistance of cell will be

5. A steady current flows in a metallic conductor of non-uniform cross-section. The quantities/quantity constant along the length of the conductor is/are

6. A uniform w ire connected across a supply produces heat H per second. If wire is cut into three equal parts and all the parts are connected in parallel across the same supply, the heat produced per second will be :

7. A wire of resistance 3 Ω is cut into three pieces, which are then joined to form a triangle. The equivalent resistance between any corners of the triangle is :

8. An electric heater is connected to the voltage supply. After few seconds, current gets its steady value then its initial current will be

9. An electric heating element consumes 500 W, when connected to a 100 V line. If the line voltage becomes 150 V, the power consumed Will be:

10. At what temperature will the resistance of a copper wire become three times its value at 00C? (Temperature coefficient of resistance for copper = 4 x 10-3 peroC)

11. By increasing the temperature, the specific resistance of a conductor and semiconductor

12. Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10 ? when a potential difference of 20 V is applied between its ends

13. For a metallic wire, the ratio V/i (V = the applied potential difference, i = current flowing) is

14. If a certain piece of copper is to be shaped into a conductor of minimum resistance, its length (L) and cross-sectional area shall respectively be :

15. If n cells each of emf e and internal resistance r are connected in parallel, then the total emf and internal resistance will be

16. In a potentiometer of 10 wires, the balance point is obtained on the 7th wire. To shift the balance point to 9th wire, we should

17. In a Wheatstone bridge if the battery and galvanometer are interchanged then the deflection in galvanometer will

18. In a Wheatstoneâ€˜s bridge all the four arms have equal resistance R. If the resistance of the galvanometer arm is also R, the equivalent resistance of the combination as seen by the battery is

19. In an experiment with potentiometer, null point with a cell is found at 240 cm. When the cell is shunted with a resistance 2 Ω, the null point becomes 120 cm internal resistance of cell is :

20. In an experiment with potentiometer, null point with a cell is found at 240 cm. When the cell is shunted with a resistance 2 Ω, the null point becomes 120 cm internal resistance of cell is :

21. In parallel combination of n cells, we obtain

22. Kirchhoffs first and second laws for electrical circuits are consequences of:

23. Kirchoffâ€˜s first and second laws in the electricity are the laws respectively of

24. Siemen is the unit of:

25. Suppose H1 is the heat generated per second in the filament of a 100 W, 250 V lamp and H2 is the heat generated in the filament of a 200 W, 250 V lamp. Then H1/H2 is equal to:

26. The charge flowing in a conductor varies with time as: q = αt +1/2 βt2 + 16 γt3 Where α, β, γ are positive constants. Then the initial current (l) is given by the condition :

27. The drift velocity does not depend upon

28. The electric resistance of a certain wire of iron is R. If its length and radius are both doubled, then

29. The example of a non-ohmic resistance is:

30. The internal resistance of a cell of emf 12 V is 5 x 10-2C Ω. It is connected across an unknown resistance. Voltage across the cell, when a current of 60 A is drawn from it, is

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10. At what temperature will the resistance of a copper wire become three times its value at 0⁰C? (Temperature coefficient of resistance for copper = 4 x 10^-3 per^oC)

26. The charge flowing in a conductor varies with time as: q = αt +1/2 βt² + 16 γt3 Where α, β, γ are positive constants. Then the initial current (l) is given by the condition :

30. The internal resistance of a cell of emf 12 V is 5 x 10^-2C Ω. It is connected across an unknown resistance. Voltage across the cell, when a current of 60 A is drawn from it, is