A step-up transformer is connected to an AC mains supply of 220 V to operate at 11000 V, 88 watt. The current in the secondary circuit, ignoring the power loss in the transformer, is:
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A step-up transformer is connected to an AC mains supply of 220 V to operate at 11000 V, 88 watt. The current in the secondary circuit, ignoring the power loss in the transformer, is:

G1 Physics · Accepted Answer

Step 1: Ideal transformer conserves power Pₛ≈Pₚ when loss is neglected. Step 2: Given secondary power Pₛ=88 W and secondary voltage Vₛ=11000 V. Step 3: Iₛ=Pₛ/Vₛ=88/11000=0.008A=8mA. Answer A. Final answer: (A) 8mA.