CUET · PHYSICS · PYQ PAPER 2025
A battery of emf 10 V and internal resistance \( 3 \, \Omega \) is connected to an external resistor. If the current in the circuit is 0.5 A, then the voltage drop across the external resistor will be
- A \(8.5 V\)
- B \(8 V\)
- C \(17 V\)
- D \(11.5 V\)
Answer & Solution
Correct Answer
(A) \(8.5 V\)
Step-by-step Solution
Detailed explanation
\( V_{ext} = E - I r \) \( V_{ext} = 10\,V - (0.5\,A \times 3\,\Omega) \) \( V_{ext} = 10\,V - 1.5\,V \) \( V_{ext} = 8.5\,V \)
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