Mutual induction

1. WELCOME

2. MUTUAL INDUCTION

3. When the strength of the current in one of the two adjacent coil changes, a change take place in the magnetic field around . As a result of this an emf is induced in the second coil . This phenomenon is mutual induction . The coil which supplied electric current is the primary and the other in which emf is induced is the secondary .

4. TRANSFORMER Transformer is a device that employs the principle of mutual induction. It is used in tape recorder, radio etc,. Transformer are of two type: (a)Step up transformer (b)Step down transformer

5. STEP UP TRANSFORMER Thick wire is used to wind the primary coil. Primary coil contains less number of turns. Secondary contains more number of coil. Thin wire is used in the secondary.

6. STEP DOWN TRANSFORMER Thin wire is used to wind the primary coil. Primary contain more number of turns. Secondary contain s less number of turns. Thick wire is used in the secondary coil.

7. The relation between the number of turns of the coil of a transformer and the induced emf can be Mathematically written as, Vs/Vp=Ip/Is=Ns/Np Vs=Voltage in the secondary coil Is=Secondary current Vp=Voltage in the primary coil Ip=the primary current Ns=Number of turns in the secondary coil Np=Number of turns in the primary coil

8. THANK YOU