Transformer

Transformer

The increase or decrease the voltage

Step up transformer

Convert energy from low voltage to high voltage and no. Of secondary coil is more than primary Ns>Np and also Vs> Vo but current is less than primary Is< Is

Step down

Convert energy from high to low voltage

No. Of turns in primary coil is more than secondary .but current in high than secondary Ns< Np Vs< Vp Is> Ip

Auto transformer

Single core and single coile transformer that continues from primary coil and tap point in center