Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app

NEET 2009

Exam: NEET
Year: 2009
Subject: Physics
Chapter: Magnetic Effects of Current

NEET 2009 · Physics · Magnetic Effects of Current

Under the influence of a uniform magnetic field, a charged particle...

Under the influence of a uniform magnetic field, a charged particle moves with constant speed

v

in a circle of radius

R

. The time period of rotation of the particle

Options

Adepends on $v$ and not on $R$
Bdepends on $R$ and not on $v$
Cis independent of both $v$ and $R$
Ddepends on both $v$ and $R$

Correct answer

C. is independent of both $v$ and $R$

Step-by-step solution

The time period of circular motion of the charged particle is given by

\begin{aligned} & \mathrm{T}=\frac{2 \pi \mathrm{r}}{\mathrm{v}}=\frac{2 \pi}{\mathrm{v}} \times \frac{\mathrm{mv}}{\mathrm{Bq}} \\ & \mathrm{T}=\frac{2 \pi \mathrm{m}}{\mathrm{Bq}} \end{aligned}

Hence, time period of rotation of the charged particle in uniform magnetic field is independent of both

v and R

.

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