Question Detail
Question
Parallel plate air capacitor: 0.2 m square plates, 1 cm apart, 50 V battery. Charge on each plate?
Correct Answer
Option A is the correct answer.
Detailed Explanation
A = 0.04 m², d = 0.01 m. C = ε₀A/d = 8.85×10⁻¹² × 0.04 / 0.01 = 3.54×10⁻¹¹ F. Q = CV = 3.54e-11 × 50 = 1.77×10⁻⁹ C = 1.77 nC.
Hint
C = ε₀A/d, Q = CV.