CUET · PHYSICS · PYQ PAPER 2025
A point charge Q is kept at the midpoint of a face of cube of side L. The electric flux emerging from the cube is
- A zero
- B \( Q(6\epsilon_0)^{-1} \)
- C \( 6Q\epsilon_0^{-1} L^2 \)
- D \( Q(2\epsilon_0)^{-1} \)
Answer & Solution
Correct Answer
(D) \( Q(2\epsilon_0)^{-1} \)
Step-by-step Solution
Detailed explanation
\( \Phi = \frac{Q_{enclosed}}{\epsilon_0} \) \( Q_{enclosed} = \frac{Q}{2} \) \( \Phi = \frac{Q/2}{\epsilon_0} = Q(2\epsilon_0)^{-1} \)
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