Moving Charges And Magnetism Ques 73

73. A straight wire of length $0.5$ metre and carrying a current of $1.2$ ampere is placed in uniform magnetic field of induction $2$ tesla. The magnetic field is perpendicular to the length of the wire. The force on the wire is

[1992]

(a) $2.4$ $N$

(b) $1.2$ $N$

(c) $3.0$ $ N$

(d) $2.0$ $N$

Show Answer

Answer:

Correct Answer: 73.(b)

Solution:

  1. (b) $F=Bi \ell=2 \times 1.2 \times 0.5=1.2 $ $N$
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