Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 202224 JuneMorning Shift
Exam
JEE Main
Year
2022
Date
24 June
Shift
Morning Shift
Subject
Physics
Chapter
Magnetic Effects of Current

JEE Main 2022 · 24 June · Morning Shift · Physics · Magnetic Effects of Current

Given below are two statements : One is labelled as Assertion (A)...

Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : In an uniform magnetic field, speed and energy remains the same for a moving charged particle.

Reason (R): Moving charged particle experiences magnetic force perpendicular to its direction of motion.

Options

  1. ABoth Assertion and Reason are true and Reason is the correct explanation of Assertion.
  2. BBoth Assertion and Reason are true but Reason is NOT the correct explanation of Assertion.
  3. CAssertion is true but Reason is false.
  4. DAssertion is false but Reason is true.

Correct answer

A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

Step-by-step solution

The force experienced by the charge particle is perpendicular to the instantaneous velocity at all instants as F→=q(v→×B→)\overset{\to}{F} = q\left(\overset{\to}{v} \times \overset{\to}{B}\right).

Hence, the magnetic force cannot bring any change in the speed of the charged particle. Since, the speed remains constant, the kinetic energy also remains constant.

Practice Magnetic Effects of Current on Quantrex Academy →

More from Magnetic Effects of Current

A hollow, right circular cone of base radius R and height h , with its tip at the origin… JEE Advanced 2026In a vacuum chamber, a particle of charge 1\ and mass 1 mg is projected with a velocity (… JEE Advanced 2026A current carrying circular loop of radius 2 cm with unit normal n = k + i 2 is placed in… JEE Main 2026A 5 mg particle carrying a charge of 5π× 10^ -6 C is moving with velocity of (3 i +2 k )×… JEE Main 2026A current of 30 A each flows in opposite directions in two conducting wires, placed… JEE Main 2026A small cube of side 1 mm is placed at the centre of a circular loop of radius 10 cm… JEE Main 2026The charged particle moving in a uniform magnetic field of (3 i + 2 j ) T has an… JEE Main 2026A circular coil of radius 2 cm and 125 turns carries a current of 1 A. The coil is placed… JEE Main 2026 Full Magnetic Effects of Current list All JEE Main PYQs