Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEETPhysicsMagnetic Effects of Current

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 → . 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

The magnitude of the magnetic induction (B) at a point on the axis at a large distance 'r' from the centre of a circular coil of 'n' turns and area 'A' carrying current ' i ' is gi 2026For a circular coil of radius a , at what distance x along its axis the magnetic field is exactly 1 27 of its value at the center? 2026A circular coil having 'n' turns, each of radius 'r' carries a current 'I'. The magnetic field at a distance x = 8 r from its centre along axis of the coil is ( ₀ = permeability of 2026The ratio of cyclotron frequency f to the radius of the path of a charged particle R is q^2 B^2 2 m^2 x . Then the value of x is ( v is velocity of charged particle) 2026In a cyclotron, for the same values of B and R, what is the ratio of the maximum kinetic energies of particles and deuteron? Mass of deuteron =2m_p , charge on deuteron =+e 2026The magnitude of the magnetic field at point O (centre of the arc) with radius R, in the following case is ( ₀ = permeability of free space, I = current and R is the radius of circ 2026Two wires of same material A and B, having lengths l and 2l 3 carry the currents I and 3I 4 respectively. Both the wires (A and B) are bent into a circles (of single turn). If B_A 2026An electron is projected with uniform velocity along the axis of a current carrying long solenoid. Which of the following is true? a. The electron will be accelerated along the axi 2026 Full Magnetic Effects of Current list All NEET PYQs