Question

A wire carrying a current of 5 A is placed perpendicular to a magnetic induction of 2T. The force on each centimeter of the wire is :

• A. 0.1 N
• B. 10 N
• C. 100 N
• D. 1 N

Answer 1

Answer: (A)

0.1 N

$F=ilB\sin \theta$

$F=5\ast l\ast 2\sin {90}^{\circ }$

$F=10l$

Force per centimetre length $=10\ast 0.01=0.1N$

Hence option 'A' is correct.