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Magnetics question

2025 · 28 Jan · Shift 1 · Q60

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JEE Main
Physics
Magnetics
2025 · 28 Jan · Shift 1 · Q60

Magnetics question

2025 · 28 Jan · Shift 1 · Q60

JEE MainPhysicsMagneticsMCQ+4 / −1

Consider a long thin conducting wire carrying a uniform current I. A particle having mass "M" and charge "

q

" is released at a distance "

a

" from the wire with a speed

v_0

along the direction of current in the wire. The particle gets attracted to the wire due to magnetic force. The particle turns round when it is at distance

x

from the wire. The value of

x

is [

\mu_0

is vacuum permeability]

A
$a\left[1-\frac{m v_o}{2 q \mu_0 \mathrm{I}}\right]$
B
$a e^{-\frac{4 \pi \mathrm{mv}_o}{q \mu_o \mathrm{I}}}$
C
$a\left[1-\frac{\mathrm{mv}}{\mathrm{q}} \mu_{\mathrm{o}} \mathrm{I}\right]$
D
$\frac{a}{2}$

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