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Physics - Current Electricity

Practise 36 BITSAT previous year questions on Current Electricity, compiled from papers spanning 2009 to 2024. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty BITSAT tests.

Current Electricity has been asked in 16 of the 16 years of BITSAT papers analysed (2009–2024), with 36 questions in all. 58% of them were easy, 31% moderate and 11% tough. Most of its questions came from 2024, with 5 questions that year. In the last three years (2022–2024) it had 9 questions across 6 papers, about 1.5 per paper.

The chapter's 9 topics are not weighted equally: Resistance and Resistivity (11 questions, 31%), Electric Instruments (6 questions, 17%), and Combination of Resistances (5 questions, 14%) have been asked the most. Resistance and Resistivity has also led over the last five years, with 5 questions. Combination of Resistances has produced the most tough questions (1).

  1. 1Five cells each of emf and internal resistance send the same amount of current through an external resistance whether the cells are connecte2024 (Memory Based Paper 1)Electric Cell or Battery
  2. 2A wire of resistance is melted and drawn in wire of one-fourth of its length. The new resistance of the wire will be2024 (Memory Based Paper 2)Resistance and Resistivity
  3. 3In the given circuit, and , then current flowing through the branch is2024 (Memory Based Paper 3)Electric Cell or Battery
  4. 4In the following circuit diagram, when resistor is removed, then equivalent resistance of the network2024 (Memory Based Paper 3)Combination of Resistances
  5. 5A conducting wire is stretched by applying a deforming force, so that its diameter decreases to of original value. The percentage change in 2024 (Memory Based Paper 3)Resistance and Resistivity
  6. 6The resistance of a wire is . It's new resistance in ohm if stretched to 5 times of its original length will be :2023 (Memory Based Paper 1)Resistance and Resistivity
  7. 7Ratio of thermal energy released in two resistor and connected in parallel in an electric circuit is :2023 (Memory Based Paper 2)Electric Power and Heating Effect of Current
  8. 8In the arrangement shown in figure, when the switch is open, the galvanometer, shows no deflection for when the switch is closed, the galvan2022Electric Instruments
  9. 9An electric current enters and leaves a uniform circular wire of radius through diametrically opposite points. A charged particle moves alon2022Resistance and Resistivity
  10. 10A wire of a certain material is stretched slowly by ten per cent. Its new resistance and specific resistance become respectively:2021Resistance and Resistivity
  11. 11A moving coil galvanometer has resistance of and full scale deflection of . It can be converted into voltmeter of full scale by connecting i2021Electric Instruments
  12. 12Two wires and of the same material, having radii in the ratio 1: 2 and carry currents in the ratio 4: 1 . The ratio of drift speed of electr2020Electric Current and Drift of Electrons
  13. 13Determine the current in resistor.2020Combination of Resistances
  14. 14The value of current I as shown in the given circuit diagram is2019Combination of Resistances
  15. 15An ammeter of resistance 1 . 5 can measure currents upto 1 A . The value of shunt resistance to measure current upto 4 A is2019Electric Instruments
  16. 16A carbon resistor of 56 5 . 6 k is to be marked with rings of different colours for its identification. The colour code sequence will be2019Color coding of resistors
  17. 17In the circuit given below, the value of resistance X , when the potential difference between the points B and D is zero, will be2018Wheatstone Bridge
  18. 18In the given circuit, it is observed that the current I is independent of the value of resistance R 5 . Then, the resistance value must sati2018Resistance and Resistivity
  19. 19The resistance of a wire at 20 C is 20 and 500 C is 60 . At which temperature, its resistance will be 25 ?2017Resistance and Resistivity
  20. 20In the circuit shown, the heat produced in 5 resistor is 10 cal s - 1 . The heat produced per sec in 4 resistor will be2017Electric Power and Heating Effect of Current
  21. 21In the circuit shown in the figure, find the current in .2016Combination of Resistances
  22. 22The drift velocity of electrons in silver wire with cross-sectional area carrying a current of is. Given atomic weight of density of silver2016Electric Current and Drift of Electrons
  23. 23Two resistances at with temperature coefficient of resistance and joined in series act as a single resistance in a circuit. The temperature 2016Resistance and Resistivity
  24. 24The resistance of a wire is . It is bent at the middle by and both the ends are twisted together to make a shorter wire. The resistance of t2015Resistance and Resistivity
  25. 25A constant voltage is applied between the two ends of a uniform metallic wire. Some heat is developed in it. The heat developed is doubled i2015Electric Power and Heating Effect of Current
  26. 26A wire is half the diameter and half the length of a wire of similar material. The ratio of resistance of to that of is2014Resistance and Resistivity
  27. 27For the circuit (figure), the current is to be measured. The ammeter shown is a galvanometer with a resistance converted to an ammeter by a 2014Electric Instruments
  28. 28What should be the characteristic of fuse wire?2013Resistance and Resistivity
  29. 29In the circuit shown in figure potential difference between points and is . the current passing through resistance will be2013Kirchoffs Laws
  30. 30Three voltmeters and having resistances and respectively, are connected as shown. When some potential difference is applied between and the 2012Electric Current and Drift of Electrons
  31. 31A letter'A' is constructed of a uniform wire with resistance per , The sides of the letter are and the cross piece in the middle is 10 long.2012Combination of Resistances
  32. 32Calculate the effective resistance between A and B in following network.2011Wheatstone Bridge
  33. 33The power dissipated in the circuit shown in the figure is 30 Watts. The value of is2010Electric Power and Heating Effect of Current
  34. 34Which of the following quantities do not change when a resistor connected to a battery is heated due to the current?2010Electric Power and Heating Effect of Current
  35. 35The length of a potentiometer wire is . A cell of emf is balanced at a length from the positive end of the wire. If the length of the wire i2009Electric Instruments
  36. 36An ammeter reads upto 1 ampere. Its internal resistance is To increase the range to 10 A the value of the required shunt is2009Electric Instruments

Frequently Asked Questions

1.How many questions are available for Current Electricity?

This chapter includes 36 questions compiled from BITSAT papers spanning 2009 to 2024.

2.Are these questions only from BITSAT, or from other exams too?

These are BITSAT questions specifically for the Current Electricity chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Current Electricity an important chapter for BITSAT Physics?

Current Electricity has appeared in 16 of the 16 years of BITSAT papers covered here, with 36 questions across 19 papers - about 2 per paper it appears in.

4.What is the difficulty level of Current Electricity questions in BITSAT?

Of the 36 questions analysed for this chapter, 58% are easy, 31% moderate and 11% tough. 2024 had the most, with 5 questions.

5.Which topics in Current Electricity should I focus on?

These topics have carried the most weightage in Current Electricity:

  • Resistance and Resistivity - 11 questions (31%)
  • Electric Instruments - 6 questions (17%)
  • Combination of Resistances - 5 questions (14%)
  • Combination of Resistances has produced the most tough questions (1).
6.Is Current Electricity's weightage in BITSAT going up or down?

Across all 19 papers analysed, Current Electricity has averaged about 1.9 questions per paper. In the last three years (2022–2024), that average has fallen, at about 1.5 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.