Question

in a transformer the transformation ratio is 0.3 if 220 volt AC is set to the ends of primer equal then the voltage across the ends of the primary coil secondary coil is​

Answer 1

Answer:

The answer is  66 V .

Explanation:

Given data:

The transformation ratio (Ns/ Np) = 0.3  

The voltage across the primary coil (Vp) = 220 V

The voltage across the secondary coil (Vs) =?

Formula:

Vs / Vp = Ns/ Np

Vs = Ns/ Np x Vp

Vs = 0.3 x 220

   = 66 V

Thus, the output voltage of the secondary coil is less than the primary voltage, therefore, it is a step-down transformer.