CUET · PHYSICS · PYQ PAPER 2025
A cell of emf 2.2 V gives a current of 0.2 A through a resistance of 9 \(\Omega\). The internal resistance of the cell will be:
- A 1 \(\Omega\)
- B 2 \(\Omega\)
- C 4 \(\Omega\)
- D 1.1 \(\Omega\)
Answer & Solution
Correct Answer
(B) 2 \(\Omega\)
Step-by-step Solution
Detailed explanation
\( r = \frac{E}{I} - R \) \( r = \frac{2.2 \text{ V}}{0.2 \text{ A}} - 9 \Omega \) \( r = 11 \Omega - 9 \Omega \) \( r = 2 \Omega \)
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