Current Electricity MCQs Quiz Multiple Choice Questions & Answers

Current Electricity MCQs questions answers

Test Your Skills in Current Electricity Quiz Online

Dive into the electrifying world of Current Electricity with our comprehensive collection of multiple-choice questions and answers. Whether you're a student delving into the fundamentals of electrical circuits, an engineer designing electrical systems, or simply curious about the flow of electric charge, our meticulously curated selection covers a wide range of topics. Explore fundamental concepts such as Ohm's law, electrical resistance, circuits analysis, and practical applications in electronics and power distribution. With our user-friendly interface and detailed explanations, mastering the complexities of current electricity has never been more engaging and accessible. Start your journey towards understanding the flow of electrons and the principles that power our modern world today!

Current Electricity Questions with Answers

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 Wheatstone‘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. Kirchoff‘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

31. The resistivity of alloy manganin is

32. The smallest resistance that can be obtained by the combination of n resistors each resistance r is :

33. The specific resistance of a rod of copper as compared to that of thin wire of copper is :

34. Two conductors of equal length and radii the ratio of 2 : 3 are; connected in parallel the source of electricity. The ratio of the velocity of electrons in the conductor be :

35. Two equal resistors are connected in series across a battery and consume a power of P. If these are connected in parallel, then the power consumed will be:

36. Two wires of the same material are given. The first wire is twice as long as the second and has twice the diameter of the second. The resistance of the first will be

37. When a metal conductor connected to left gap of a meter bridge is heated, the balancing point

38. Which of the following has a negative temperature coefficient of resistance ?


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