CUET · PHYSICS · PYQ PAPER 2025
There are four capacitors: \( C_1, C_2, C_3 \) and \( C_4 \) with equal capacitance \( C_0 \).
(A) for capacitor \( C_1 \) area of the plates is doubled
(B) for capacitor \( C_2 \) distance between the plates is tripled
(C) the capacitor \( C_3 \) is filled completely with a material having dielectric constant K = 3
(D) for capacitor \( C_4 \) there is no change
If the capacitors are arranged in decreasing order of their capacitances, then choose the correct answer from the options given below:
- A (A), (B), (C), (D)
- B (C), (A), (D), (B)
- C (B), (A), (D), (C)
- D (C), (B), (D), (A)
Answer & Solution
Correct Answer
(B) (C), (A), (D), (B)
Step-by-step Solution
Detailed explanation
\( C_0 = \frac{\epsilon_0 A}{d} \) \( C_1 = \frac{\epsilon_0 (2A)}{d} = 2C_0 \) \( C_2 = \frac{\epsilon_0 A}{3d} = \frac{1}{3}C_0 \) \( C_3 = K \frac{\epsilon_0 A}{d} = 3C_0 \) \( C_4 = C_0 \) Decreasing order: \( C_3 > C_1 > C_4 > C_2 \) (C), (A), (D), (B)
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