Question
Physics Question on Magnetism and matter
The effect due to uniform magnetic fie Id on a freely suspended magnetic needle is as follows
A
both torque and net force are present
B
torque is present but no net force
C
both torque and net force are absent
D
net force is present but not torque
Answer
torque is present but no net force
Explanation
Solution
When a magnetic needle is placed in a uniform magnetic field, equal and opposite forces act on the poles of the needle which give rise to a torque, but not net force.