If a current carrying solenoid is suspended freely it will__________________?
Correct answer: B. come to rest in N-S direction
- A. be rotating
- B. come to rest in N-S direction
- C. vibrating like galvanometer needle
- D. comes to rest after rotation
Explanation
A current-carrying solenoid behaves like a bar magnet, so its magnetic dipole aligns itself with Earth's magnetic field when freely suspended. It therefore comes to rest along the north-south direction. The likely wrong choice is d, because rotation may occur initially, but the final condition is alignment in the N-S direction.
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About Magnetic Flux Density
Magnetic flux density measures the magnetic force acting on a current carrying conductor or moving charge in a magnetic field. Work includes the relations B equals F divided by IL and F equals qvB, the tesla as its SI unit, field direction and the distinction between flux density and magnetic flux.
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