Magnetisation

Q. Magnetic field intensity is defined as

1. Magnetic moment per unit volume
2. Magnetic induction force acting on a unit magnetic pole
3. Number of lines of force crossing per unit area
4. Number of lines of force crossing per unit volume

Q. The magnetic induction in air at a distance d from an isolated point pole of strength m unit will be

1. $\frac{m}{d}$
   
2. $\frac{m}{d^2}$
   
3. $md$
   
4. $m{d}^2$

Q. If a piece of metal was thought to be magnet, which one of the following observations would offer conclusive evidence

1. It attracts a known magnet
2. It repels a known magnet
3. Neither (a) nor (b)
4. It attracts a steel screw driver

Q. If a piece of metal was thought to be magnet, which one of the following observations would offer conclusive evidence

1. It attracts a known magnet
2. It repels a known magnet
3. Neither (a) nor (b)
4. It attracts a steel screw driver

Q. A circular loop of radius $r$ is moved away from a long current carrying wire, then induced current in the circular loop will be -

Assume the loop and wire are in the plane of paper of your notebook and the observer is observing from above the plane.

1. Initially clockwise, then anti-clockwise
2. Clockwise
3. No current will be induced
4. Anti-clockwise