A step-up transformer operates on a 230 V line and supplies

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A step-up transformer operates on a 230 V line and supplies a load of 2 ampere. The ratio of the primary and secondary windings is 1 : 25. The current in the primary is

1. 25 A
2. 50 A
3. 15 A
4. 12.5 A

Correct Option: B

	N_p	=	E_p	=	1
	N_s		E_s		25

∴ E_s = 25 E_p
But E_sI_s = E_pI_p
25E_p × 2 = E_p × I_p ⇒ Ip = 50 A