in an ideal transformer the no of turns in

Question

In an ideal transformer , the no. of turns in primary & secondary are 200 & 1000 respectively .If power input to primary is 10kW at 200V.Calculate

i)output voltage

ii)current in primary

Ans) N_P/N_S = V_P/V_S

200/1000 = 200/V_P   ; V_p = 1000V

 P=IV; 10000=200*I

I = 50 A