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Physics - Magnetic Effects of Current

Practise 36 BITSAT previous year questions on Magnetic Effects of Current, 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.

Magnetic Effects of Current has been asked in 15 of the 16 years of BITSAT papers analysed (2009–2024), with 36 questions in all. 47% of them were easy, 42% moderate and 11% tough. Most of its questions came from 2023, with 4 questions that year. In the last three years (2022–2024) it had 7 questions across 5 papers, about 1.4 per paper.

The chapter's 6 topics are not weighted equally: Magnetic Field (11 questions, 31%), Motion of Charged Particle in Magnetic Field (11 questions, 31%), and Magnetic Moment (5 questions, 14%) have been asked the most. Magnetic Field has also led over the last five years, with 4 questions. Magnetic Field has produced the most tough questions (2).

  1. 1The electrostatic force and magnetic force acting on a charge q moving with velocity v can be written:2024 (Memory Based Paper 1)Motion of Charged Particle in Magnetic Field
  2. 2A long straight wire of radius a carries a steady current 1 . The current is uniformly distributed across its cross section. The ratio of th2024 (Memory Based Paper 2)Magnetic Field
  3. 3The straight wire carries a current . The ends of the wire subtend angles and at the point as shown in figure. The magnetic field at the poi2024 (Memory Based Paper 3)Magnetic Field
  4. 4A charge particle is moving in a uniform magnetic field . If it has an acceleration of , then the value of will be :2023 (Memory Based Paper 1)Motion of Charged Particle in Magnetic Field
  5. 5The magnetic moment of an electron (e) revolving in an orbit around nucleus with an orbital angular momentum is given by:2023 (Memory Based Paper 1)Magnetic Moment
  6. 6The magnetic moments associated with two closely wound circular coils A and B of radius and respectively are equal if: (Where and are number2023 (Memory Based Paper 2)Magnetic Moment
  7. 7A solenoid of 1200 turns is wound uniformly in a single layer on a glass tube long and in diameter. The magnetic intensity at the center of 2023 (Memory Based Paper 2)Magnetic Field
  8. 8A proton moving with a velocity enters a magnetic field of tesla at an angle of with the field. The radius of curvature of its path will be 2021Motion of Charged Particle in Magnetic Field
  9. 9A solenoid is long and in diameter. It has 5 layers of winding of 1000 turns each and carries a current of . What is the magnetic field at i2021Magnetic Field
  10. 10An electron moves in a circular arc of radius 10 at a contant speed of with its plane of motion normal to magnetic flux density of . What wi2020Motion of Charged Particle in Magnetic Field
  11. 11An electron revolves in a circular orbit of radius r with angular speed . The magnetic field at the centre of electron orbit is2019Motion of Charged Particle in Magnetic Field
  12. 12Two electrons are moving with equal speed of 5 10 5 m s - 1 parallel to each other. The ratio of the electrostatic to the magnetic force bet2019Biot-Savart's Law and Ampere's Circuital Law
  13. 13The magnetic field at the centre O of the current-carrying square loop shown in the figure is2019Magnetic Field
  14. 14A proton is revolving on a circular path of radius 2 mm with frequency 10 Hz . Magnetic dipole moment associated with proton is2019Magnetic Dipole
  15. 15A current i flows through a loop as shown in figure. The magnetic field at the Centre O is2018Magnetic Field
  16. 16The ratio of angular momentum L to the atomic dipole moment i for hydrogen like atoms and ions is2018Magnetic Moment
  17. 17A copper rod of mass m slides under gravity on two smooth parallel rails l distance apart and set an angle to the horizontal. At the bottom,2018Force and Torque on Current Carrying Conductor
  18. 18To increase the current sensitivity of a moving coil galvanometer by 50 % , its resistance is increased, so that new resistance becomes twic2018Force and Torque on Current Carrying Conductor
  19. 19A positive charge q is projected in magnetic field of width m v 2 q B with velocity v . Then, the time taken by charged particle to emerge f2017Motion of Charged Particle in Magnetic Field
  20. 20A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of a permanent magnet such that B is in plane 2017Force and Torque on Current Carrying Conductor
  21. 21What is the magnetic field at the centre of arc in the figure below?2017Magnetic Field
  22. 22A deuteron of kinetic energy is describing a circular orbit of radius 0.5 metre in a plane perpendicular to the magnetic field . The kinetic2016Motion of Charged Particle in Magnetic Field
  23. 23A wire carrying current I has the shape as shown in adjoining figure. Linear parts of the wire are very long and parallel to -axis while sem2016Biot-Savart's Law and Ampere's Circuital Law
  24. 24A charged particle moving in a uniform magnetic field and losses of its kinetic energy. The radius of curvature of its path changes by2015Motion of Charged Particle in Magnetic Field
  25. 25Two particles and having equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic fi2015Motion of Charged Particle in Magnetic Field
  26. 26A long straight wire along the -axis carries a current I in the negative -direction. The magnetic vector field at a point having coordinates2015Biot-Savart's Law and Ampere's Circuital Law
  27. 27A narrow beam of protons and deuterons, each having the same momentum, enters a region of uniform magnetic field directed perpendicular to t2014Motion of Charged Particle in Magnetic Field
  28. 28Two parallel conductors carry current in opposite directions as shown in figure. One conductor carries a current of . Point is a distance to2013Magnetic Field
  29. 29A uniform electric field and uniform magnetic field are acting along the same direction in a certain region. If an electron is projected in 2013Motion of Charged Particle in Magnetic Field
  30. 30A horizontal overhead powerline is at height of from the ground and carries a current of from east to west. The magnetic field directly belo2012Magnetic Field
  31. 31If is magnetic moment and is the magnetic field, then the torque is given by2012Magnetic Moment
  32. 32Magnetic moment of bar magnet is . The work done to turn the magnet by of magnet in direction of magnetic field will be2012Magnetic Dipole
  33. 33A steady current is set up in a cubic network composed of wires of equal resistance and length d as shown in figure. What is the magnetic fi2011Magnetic Field
  34. 34If is magnetic moment and is the magnetic field, then the torque is given by2011Magnetic Moment
  35. 35The magnetic field at the origin due to the current flowing in the wire is2010Magnetic Field
  36. 36A conducting circular loop of radius carries a constant current It is placed in a uniform magnetic field such that is perpendicular to the p2009Force and Torque on Current Carrying Conductor

Frequently Asked Questions

1.How many questions are available for Magnetic Effects of Current?

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 Magnetic Effects of Current chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Magnetic Effects of Current an important chapter for BITSAT Physics?

Magnetic Effects of Current has appeared in 15 of the 16 years of BITSAT papers covered here, with 36 questions across 18 papers - about 2 per paper it appears in.

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

Of the 36 questions analysed for this chapter, 47% are easy, 42% moderate and 11% tough. 2023 had the most, with 4 questions.

5.Which topics in Magnetic Effects of Current should I focus on?

These topics have carried the most weightage in Magnetic Effects of Current:

  • Magnetic Field - 11 questions (31%)
  • Motion of Charged Particle in Magnetic Field - 11 questions (31%)
  • Magnetic Moment - 5 questions (14%)
  • Magnetic Field has produced the most tough questions (2).
6.Is Magnetic Effects of Current's weightage in BITSAT going up or down?

Across all 18 papers analysed, Magnetic Effects of Current has averaged about 2.0 questions per paper. In the last three years (2022–2024), that average has fallen, at about 1.4 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.