CUET · PHYSICS · PYQ PAPER 2025
Two point charges of 2 C each are separated from each other by a distance of 1 m in water (K = 80). The force between the charges is:
- A \( 4.5 \times 10^8 \text{ N} \)
- B \( 4.5 \times 10^9 \text{ N} \)
- C \( 2.5 \times 10^9 \text{ N} \)
- D \( 2.5 \times 10^8 \text{ N} \)
Answer & Solution
Correct Answer
(A) \( 4.5 \times 10^8 \text{ N} \)
Step-by-step Solution
Detailed explanation
\(F = \frac{k q_1 q_2}{K r^2}\) \(F = \frac{(9 \times 10^9)(2)(2)}{(80)(1^2)}\) \(F = \frac{36 \times 10^9}{80}\) \(F = 4.5 \times 10^8 \text{ N}\)
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