The effect of a magnetic is known as magnetism. The major use of magnetism is in the production of electricity at power stations. Due to the effect of magnetism, mechanical energy is converted into the electrical energy. When a magnetic flux is changed through a coil, current flows into the coil, this phenomena is used in many electronics. Magnetism is widely used in ATM cards, credit and debit card. It is used in telephones, radio, television and computers. Furthermore, it is also used in transformers.