Download the app


A bar magnet when placed at an angle of 30o to the direction of magnetic field induction of 5 x 10-2 T experiences a couple 25 x 10-6 N m. If the length of the magnet is 5 cm, its pole strength is 

2 x 10-2 A-m
5 x 10-2 A-m
2 A-m
5 A-m

detailed solution

Correct option is A

τ=MBsinθ⇒τ=(mL)Bsinθ⇒25 x 10-6=(m x 5 x 10-2) x 5 x 10-2 x sin30o⇒m=2 x 10-2 Am

Talk to our academic expert!


Are you a Sri Chaitanya student?

Similar Questions

The magnetic needle of a tangent galvanometer is deflected at an angle 30o.The horizontal component of earth's magnetic field 0.34 x 10-4 T is along the plane of the coil. The magnetic induction produced by the coil at its center is

phone icon
whats app icon