Prabin Kalikote

An electromagnet is made by using a cylindrical form of an insulated copper coil having a large number of close turn is a solenoid.

It is used to strengthen the magnetic field. The device that breaks the circuit is MCB.

fig. Electric bell

When a current is passed through a wire, it produces a magnetic field around it which is called the magnetic effect of an electric current.

When the current is passed through the wire of high resistance, it becomes extremely hot and produces heat which is called the heating effect of an electric current.

When the current is passed through a wire of high resistance which becomes extremely hot and produces light which is called the lighting effects of an electric current.

The device which converts mechanical energy into electrical energy is called a dynamo.

The process of producing current in a closed coil due to the relative motion between magnet and coil is called electromagnetic induction.