Answer the question number 2 in this pic in detail

Acoil formed by wrapping 80 turns of wire in the shape of a square is positioned in a magnetic field so that the normal to the plane of the coil makes an angle of 28.0° with the direction of the field. when the magnetic field is increased uniformly from 200 µt to 600 µt in 0.400 as, an emf of magnitude 80.0 mv is induced in the coil. what is the total length of the wire?

What is a carrier wave and how does it affect what you hear on the radio

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?