Question:
A transformer operates at \(V_p=6\) kV on the primary side and supplies electric energy at \(V_s=220\) V to a number of houses in a town. If the total power consumption by the town is \(7.2\) kW, the current (in ampere) in the primary is
A transformer operates at \(V_p=6\) kV on the primary side and supplies electric energy at \(V_s=220\) V to a number of houses in a town. If the total power consumption by the town is \(7.2\) kW, the current (in ampere) in the primary is
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For an ideal transformer:
\[
V_pI_p=V_sI_s
\]
So power is conserved.
Updated On: Apr 29, 2026
- \(2\)
- \(1.2\)
- \(2.5\)
- \(1\)
- \(1\)
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
For an ideal transformer:
\[
P_p=P_s
\]
Given:
\[
P=7.2\text{ kW}=7200\text{ W}
\]
\[
V_p=6\text{ kV}=6000\text{ V}
\]
Current in primary:
\[
I_p=\frac{P}{V_p}=\frac{7200}{6000}=1.2\text{ A}
\]
Hence,
\[
\boxed{(B)\ 1.2}
\]
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