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>>Class 12
>>Physics
>>Moving Charges and Magnetism
>>Lorentz Force
>> $A charge of 0.04 C is moving in a magnet$

Question

A charge of $0.04 C$ is moving in a magnetic field of $0.02 T$ with a velocity $10 m / s$ in a direction making an angle $3 0^{o}$ with the direction of field. The force acting on it will be :

A

$4 \times 1 0^{- 3} N$

B

$2 \times 1 0^{- 3} N$

C

zero

D

$8 \times 1 0^{- 3} N$

Medium

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Updated on : 2022-09-05

Solution

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Correct option is A)

Force on the moving charge is,
$F = q (v \times B) = q v B sin θ = 0.04 \times 10 \times 0.02 sin 3 0^{o} = 0.04 \times 10 \times 0.02 \times 0.5 = 4 \times 1 0^{- 3} N$

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