Magnetic Flux

The primary and secondary coils of a transformer have and turns respectively. If the magnetic flux linked with the primary coil is given by; where is in Weber, is time in seconds, and is a constant, the output voltage across the secondary coil is:
1.
2.
3.
4.

A circular disc of radius is placed in a uniform magnetic field of induction in such a way that its axis makes an angle of with The magnetic flux linked with the disc is:
1.
2.
3.
4.

A square loop with a side length of and resistance of is placed in a uniform magnetic field of The plane of the loop is perpendicular to the direction of the magnetic field. The magnetic flux through the loop is:
1. zero
2.
3.
4.