A transformer of 100 % efficiency has 200 turns in the primary and 40,000 turns in the secondary. It is connected to a 200 V a.c. mains and the secondary feeds to a `100 k Omega` resistance. Calculate the output potential difference per turn and the power delivered to the load.

Explanation

`N_P = 200, N_S = 4000, V_P = 220V`
`V_S = (N_S/N_P)V_P = (40000/200) (220V) = 44000 V = 44kV`
Power delivered to load `V_S I_S`
`=V_S (V_S/V_R) = (V_S^2)/(R_S) = ((44000V)^2)/(100 xx 10^3 Omega)`
`= 19360 W = 19.36 kW`