COMEDK · Physics · 23. Alternating Current
A power transmission line feeds input power at 2200 V to a step-down transformer with its primary windings having 2000 turns. The output power is delivered at 220 V by the transformer. If the current in the primary of the transformer is 2 A and its efficiency is \(80 \%\), the output current would be:
- A 8 A
- B 16 A
- C 4 A
- D 32 A
Answer & Solution
Correct Answer
(B) 16 A
Step-by-step Solution
Detailed explanation
The input power \(P_{in}\) is given by the product of primary voltage \(V_p\) and primary current \(I_p\). \(P_{in} = V_p \times I_p = 2200 \text{ V} \times 2 \text{ A} = 4400 \text{ W}\) The efficiency \(\eta\) of the transformer is defined as the ratio of output power…
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