Electromagnetic Induction — Physics STD 12 Science — Question

After performing a large number of experiments, Faraday and Henry made the following observations about electromagnetic induction

1. a current is induced in a coil when it is moved $($rotated$)$ relative to a fixed magnet.
2. a current is also induced in a fixed coil when a magnet is moved $($or rotated$)$ relative to the fixed coil.
3. no current is induced in a coil when the coil and magnet both are stationary relative to one another.
4. when the direction of motion of coil $($or magnet$)$ is reversed , the direction of current induced in the coil also get reversed.
5. the magnitude of current induced in the coil can be increased.

1. by winding the coil on a soft iron core.
2. by increasing the number of turns in the coil.
3. by increasing the strength of magnet.
4. by increasing the speed of rotation of coil $($magnet$).$