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Definition of Ampere

A straight wi...

Question

A straight wire of length 0.5 metre and carrying a current of 1.2 Ampere is placed in a uniform magnetic field of induction 2 T. The force experienced by the wire will be :

A

2.4 N

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B

1.2 N

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C

3.0 N

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D

2.0 N

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Solution

The correct option is D 1.2 N
$d F_{m a g} = i (\to d l \times \to B)$
Since it is a straight line segment,
$F_{m a g} = 1.2 \times 0.5 \times 2 N = 1.2 N$

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