If a transformer have turn ratio 5 , frequency 50Hz root mean square value of potential difference on primary 100 volts and the resistance of the secondary winding is 500Ω then the peak value of voltage in secondary winding will be (the efficiency of the transformer is hundred percent)
The rms voltage in the secondary winding is given as,
Turnratio=VpVs
5=100Vs
Vs=20V