The power consumed by the 30 Ω resistor is: 

F1 Engineering Arbaz 29-12-23 D12

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SSC JE Electrical 9 Oct 2023 Shift 3 Official Paper-I
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  1. 10 W
  2. 300 W
  3. 3000 W
  4. 9000 W

Answer (Detailed Solution Below)

Option 3 : 3000 W
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Detailed Solution

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Concept

The power across any resistor is given by:

\(P={V^2\over R}\)

where, P = Power

V = Supply voltage

R = Resistance

Calculation

In a parallel circuit, the voltage remains the same. So, the voltage across the 30Ω resistor is 300 V.

The power consumed by the 30 Ω resistor is given by:

\(P={300^2\over 30}\)

P = 3000 W

Additional Information For a series circuit, the power across any resistance is given by:

\(P=I^2\times R\)

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