What is the value of resistance RL in the circuit shown in the figure to deliver maximum power from the source to load?

F3 Savita ENG 28-12-23 D1

This question was previously asked in
UPSC ESE (Prelims) Electronics and Telecommunication Engineering 19 Feb 2023 Official Paper
View all UPSC IES Papers >
  1. 22.83 Ω
  2. 20.83 Ω
  3. 18.83 Ω
  4. 16.83 Ω

Answer (Detailed Solution Below)

Option 2 : 20.83 Ω
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Calculation:

 

F3 Savita ENG 28-12-23 D2

 

F3 Savita ENG 28-12-23 D3

From the above circuit, 10 || 30 & 20 || 40 Ω

\(R_T=\frac{10\times 30}{10+30} + \frac{20\times40}{20+40}\)

\(R_T=\frac{300}{40} + \frac{800}{60}\)

⇒ 7.5 + 13.33 = 20.83 Ω

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