A 1:5 step-up transformer has 120V across the primary and 600 ohms resistance across the secondary. Assuming 100% efficiency, the primary current will be:
(A) 0.2 Amp. (B) 5 Amps. (C)10 Amps. (D) 20 Amps
(A) 0.2 Amp. (B) 5 Amps. (C)10 Amps. (D) 20 Amps