STANDARDPhysics-Electrostatics
STANDARD Physics Capacitance MCQ Question
Type: MCQ-numerical-Medium
A metallic sphere of radius 18 cm has been given a charge of 5 × 10⁻⁶ C. The energy of the charged conductor is
A
0.2 J
B
0.6 J
C
1.2 J
D
2.4 J
Correct Answer
Option B
Detailed Explanation
The energy of the charged conductor is calculated using the formula U = q² / (2C). Given r = 18 cm and q = 5 × 10⁻⁶ C, we find C using C = 4πε₀r. Substituting the values, we get U = 0.625 J, which is closest to 0.6 J.
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