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Physics - Magnetic Effects of Current

Practise 85 KCET previous year questions on Magnetic Effects of Current, compiled from papers spanning 2007 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty KCET tests.

Magnetic Effects of Current has been asked in 20 of the 20 years of KCET papers analysed (2007–2026), with 85 questions in all. 46% of them were easy, 34% moderate and 20% tough. Most of its questions came from 2019, with 7 questions that year. In the last three years (2024–2026) it had 11 questions across 3 papers, about 3.7 per paper.

The chapter's 8 topics are not weighted equally: Magnetic Field (31 questions, 36%), Motion of Charged Particle in Magnetic Field (28 questions, 33%), and Force and Torque on Current Carrying Conductor (12 questions, 14%) have been asked the most. Magnetic Field has also led over the last five years, with 7 questions. Magnetic Field has produced the most tough questions (7).

  1. 1A proton, an electron and an -particle enter at right angles to a uniform magnetic field with the same velocity. If and are the radii of cir2026Motion of Charged Particle in Magnetic Field
  2. 2Biot-Savart law indicates that an electron moving with a velocity produces a magnetic field around it such that2026Biot-Savart's Shifting of Vectors
  3. 3Two identical circular current loops carrying equal currents are placed with their axes inclined at to each other as shown in the figure. Th2026Biot-Savart’s Law and Ampere’s Circuital Law
  4. 4Two thin long parallel wires separated by a distance ' ' from each other in vacuum carry a current of I ampere in opposite directions. Then,2025Force and Torque on Current Carrying Conductor
  5. 5A solenoid is 1 m long and 4 cm in diameter. It has five layers of windings of 1000 turns each and carries a current of 7 A . The magnetic f2025Magnetic Field
  6. 6Identify the correct statement2025Magnetic Field
  7. 7Which of the following graphs represents the variation of magnetic field with perpendicular distance ' ' from an infinitely long, straight c2025Magnetic Field
  8. 8A square loop of side 2 m lies in the plane in a region having a magnetic field . The magnitude of magnetic flux through the square loop is2025Magnetism and Properties of Magnet
  9. 9A coil having 9 turns carrying a current produces magnetic field at the centre. Now the coil is rewounded into 3 turns carrying same current2024Magnetic Field
  10. 10A particle of specific charge is projected the origin towards positive -axis with the velocity in a uniform magnetic field T. The velocity o2024Motion of Charged Particle in Magnetic Field
  11. 11The magnetic field at the centre of a circular coil of radius carrying current is 64 times the magnetic field at a distance on its axis from2024Magnetic Field
  12. 12A charged particle is subjected to acceleration in a cyclotron as shown. The charged particle undergoes increase in its speed2023Motion of Charged Particle in Magnetic Field
  13. 13A positively charged particle of mass is passed through a velocity selector. It moves horizontally righward without deviation along the line2023Motion of Charged Particle in Magnetic Field
  14. 14The torque acting on a magnetic dipole placed in uniform magnetic field is zero, when the angle between the dipole axis and the magnetic fie2023Magnetic Dipole
  15. 15A proton and an alpha-particle moving with the same velocity enter a uniform magnetic field with their velocities perpendicular to the magne2023Motion of Charged Particle in Magnetic Field
  16. 16A moving coil galvanometer is converted into an ammeter of range 0 to . The galvanometer resistance is and the shunt resistance has a value 2023Force and Torque on Current Carrying Conductor
  17. 17A metallic rod of mass per unit length is lying horizontally on a smooth inclined plane which makes an angle of with the horizontal. A magne2022Force and Torque on Current Carrying Conductor
  18. 18A proton moves with a velocity of through the uniform electric field, and the uniform magnetic field . The approximate net force acting on t2022Motion of Charged Particle in Magnetic Field
  19. 19A solenoid of length having 100 turns carries a current of . The magnetic field at one end of the solenoid is2022Magnetic Field
  20. 20A circular coil of wire of radius has turns and carries a current . The magnetic induction at a point on the axis of the coil at a distance 2022Magnetic Field
  21. 21A strong magnetic field is applied on a stationary electron. Then, the electron2021Motion of Charged Particle in Magnetic Field
  22. 22Two parallel wires in free space are apart and each carries a current of in the same direction. The force exerted by one wire on the other [2021Force and Torque on Current Carrying Conductor
  23. 23A toroid with thick windings of turns has inner and outer radii and , respectively. If it carries certain steady current , the variation of 2021Magnetic Field
  24. 24A tightly wound long solenoid has turns per unit length, a radius and carries a current . A particle having charge and mass is projected fro2021Magnetic Field
  25. 25In the given figure, the magnetic field at .2020Biot-Savart's Law and Ampere's Circuital Law
  26. 26The magnetic field at the origin due to a current element placed at a point with vector position is2020Magnetic Field
  27. 27A long cylindrical wire of radius carries a uniform current flowing through it. The variation of magnetic field with distance from the axis 2020Magnetic Field
  28. 28A cyclotron is used to accelerate protons deuterons and -particles . While exiting under similar conditions, the minimum KE is gained by2020Motion of Charged Particle in Magnetic Field
  29. 29The ratio of magnetic field at the centre of a current carrying circular coil to its magnetic moment is , if the current and the radius both2020Magnetic Field
  30. 30Two long straight parallel wires are a distance part. They carry steady equal currents flowing out of the plane of the paper. The variation 2020Force and Torque on Current Carrying Conductor
  31. 31In a cyclotron a charged particle2019Motion of Charged Particle in Magnetic Field
  32. 32A circular current loop of magnetic moment \( M \) is in an arbitrary orientation in an external uniform magnetic field \( {B} \). The work 2019Magnetic Moment
  33. 33In a permanent magnet at room temperature2019Magnetic Moment
  34. 34An electron is moving with an initial velocity \( {V}=V_{0} {i} \) and is in a uniform magnetic field \( {B}=B_{0} {j} \). Then its de Brogl2019Biot-Savart's Law and Ampere's Circuital Law
  35. 35A magnetic needle has a magnetic moment of \( 5 10^{-2} {Am}^{2} \) and moment of inertia \( 8 \) \( 10^{-6} {kgm}^{2} \). It hasa period of2019Magnetic Moment
  36. 36A toroid has \( 500 \) turns per metre length. If it carries a current of \( 2 {~A} \), the magnetic energy density inside the toroid is2019Magnetic Field
  37. 37The magnetic field at the centre ' \( {O} \) ' in the given figure is2019Magnetic Field
  38. 38The correct Biot- Savart law in vector form is2018Biot-Savart's Law and Ampere's Circuital Law
  39. 39An electron is moving in a circle of radius \( r \) in a magnetic field B. Suddenly the field is reduced to \( {B}{2} \). The radius of the 2018Motion of Charged Particle in Magnetic Field
  40. 40A cyclotron's oscillator frequency is \( 10 {MHz} \) and the operating magnetic field is \( 0.66 {~T} \). If the radius of its dees is \( 602018Motion of Charged Particle in Magnetic Field
  41. 41The mean energy of a molecule of an ideal gas is2017Motion of Charged Particle in Magnetic Field
  42. 42A cylindrical conductor of diameter \( 0.1 {~mm} \) carries a current of \( 90 {~mA} \). The current density (in \( . {Am}^{-2} ) \) is \( (2017Magnetic Dipole
  43. 43The output of a step down transformer is measured to be \( 48 {~V} \) when connected to a \( 12 {~W} \) bulb. The value of peak current is2017Force and Torque on Current Carrying Conductor
  44. 44In the three parts of a transistor, 'Emitter' is of2017Magnetic Field
  45. 45A proton is projected with a uniform velocity 'v' along the axis of a current carrying solenoid, then2016Motion of Charged Particle in Magnetic Field
  46. 46In the cyclotron, as radius of the circular path of the charged particle increases (to = angular velocity, \( v= \) linear velocity)2016Motion of Charged Particle in Magnetic Field
  47. 47A conducting wire carrying current is arranged as shown. The magnetic field at ' \( O \) '2016Magnetic Field
  48. 48A long solenoid with \( 40 \) turns per cm carries a current of \( 1 {~A} \). The magnetic energy stored per unit volume is \( J m^{-3} \).2016Magnetic Field
  49. 49Two parallel wires \( 1 {~m} \) apart carry currents of \( 1 {~A} \) and \( 3 {~A} \) respectively in opposite directions. The force per uni2015Motion of Charged Particle in Magnetic Field
  50. 50If there is no torsion in the suspension thread, then the time period of a magnet executing SHM is2015Magnetic Field

Frequently Asked Questions

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

This chapter includes 85 questions compiled from KCET papers spanning 2007 to 2026.

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

These are KCET 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 KCET Physics?

Magnetic Effects of Current has appeared in 20 of the 20 years of KCET papers covered here, with 85 questions across 20 papers - about 4 per paper it appears in.

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

Of the 85 questions analysed for this chapter, 46% are easy, 34% moderate and 20% tough. 2019 had the most, with 7 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 - 31 questions (36%)
  • Motion of Charged Particle in Magnetic Field - 28 questions (33%)
  • Force and Torque on Current Carrying Conductor - 12 questions (14%)
  • Magnetic Field has produced the most tough questions (7).
6.Is Magnetic Effects of Current's weightage in KCET going up or down?

Across all 20 papers analysed, Magnetic Effects of Current has averaged about 4.3 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 3.7 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.