CUET · PHYSICS · PYQ PAPER 2025
Choose the correct option from the following:
(A) The internal resistance of a cell depends on its distance between electrodes and on the area of the electrodes.
(B) The emf of a cell is measured when it is used in series in an electrical circuit carrying current I.
(C) If a cell of emf E and of internal resistance r is providing current/through a resistance R then the potential difference across the cell is V = I(R + r).
(D) The emf of a cell is 1 V, if 1 J of work is done by the cell to drive 1 C of charge in the whole circuit.
Choose the correct answer from the options given below:
- A (A) and (B) only
- B (B) and (C) only
- C (C) and (D) only
- D (A) and (D) only
Answer & Solution
Correct Answer
(D) (A) and (D) only
Step-by-step Solution
Detailed explanation
(A) Correct: The internal resistance \((r)\) of a galvanic cell depends on physical factors including the distance between the electrodes (directly proportional) and the surface area of the electrodes submerged in the electrolyte (inversely proportional). (D) Correct: By…
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