TS EAMCET · Physics · Current Electricity
A battery with internal resistance of \(4 \Omega\) is connected to a circuit consisting three resistances, \(R, 2 R\) and \(4 R\) (see following figure). If the power generated in the circuit is highest, then the magnitude of \(R\) must be 
- A \(4 \Omega\)
- B \(7 \Omega\)
- C \(10 \Omega\)
- D \(14 \Omega\)
Answer & Solution
Correct Answer
(B) \(7 \Omega\)
Step-by-step Solution
Detailed explanation
For maximum power output, external resistance value must be equals to internal resistance of source. In given circuit, \(R, 2 R\) and \(4 R\) resistance are in parallel and their equivalent resistance is \(R_{\mathrm{eq}}\). So,…
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