A 12 V, 60 W lamp is connected to the secondary of a step-down transformer, whose primary is connected to ac mains of 220 V. Assuming the transformer to be ideal, what is the current in the primary winding?

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Posted on: June 26, 2024 by lovekush_kumar | Category: Physics | Share

Ideal so power at primary(Pp) is eqaul to power at secondary(Ps)

Ps is 60Watt

Pp= VI where V is 220 Volt so I= 60/220 i.e. 0.27Ampere