Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AIIMS 201826 May
Exam
AIIMS
Year
2018
Date
26 May
Subject
Physics
Chapter
Magnetic Effects of Current

AIIMS 2018 · 26 May · Physics · Magnetic Effects of Current

Assertion : Magnetic field can not change kinetic energy of a...

Assertion : Magnetic field can not change kinetic energy of a moving charge. Reason : Magnetic field can not change velocity vector.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

C. If assertion is true but reason is false.

Step-by-step solution

Magnetic force on moving charge is always perpendicular to its velocity. F⃗=q(v×B⃗)\vec{F}=q(v \times \vec{B}) Also, work done by magnetic force on a moving charge is zero.
Practice Magnetic Effects of Current on Quantrex Academy →

More from Magnetic Effects of Current

The magnitude of the magnetic induction (B) at a point on the axis at a large distance… MHT CET Medical 2026For a circular coil of radius a , at what distance x along its axis the magnetic field is… MHT CET Medical 2026A circular coil having 'n' turns, each of radius 'r' carries a current 'I'. The magnetic… MHT CET Medical 2026The ratio of cyclotron frequency f to the radius of the path of a charged particle R is… MHT CET Medical 2026In a cyclotron, for the same values of B and R, what is the ratio of the maximum kinetic… MHT CET Medical 2026The magnitude of the magnetic field at point O (centre of the arc) with radius R, in the… MHT CET Medical 2026Two wires of same material A and B, having lengths l and (2l)/(3) carry the currents I… MHT CET Medical 2026An electron is projected with uniform velocity along the axis of a current carrying long… MHT CET Medical 2026 Full Magnetic Effects of Current list All AIIMS PYQs