Question

A current of $1A$ flows in a length $0.1m$ placed in a magnetic field of $0.5T$. Calculate the force acting on the wire when the wire makes an angle of ${90}^{\circ }$ with respect to the magnetic field.

• A. $0N$
• B. $0.05N$
• C. $0.5N$
• D. $1N$

Answer 1

Answer: (B)

$0.05N$

$I=1A;l=0.1m$
$B=0.5T$
$F=BIl\sin \theta$
$\theta ={90}^{\circ }$
$F=0.5\times 1\times 0.1\times \sin {90}^{\circ }=0.05N$