Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-numerical-Hard-Class 12
Calculate the work required to bring a charge -q to point D, given charges +q at A, -q at B, and +q at C, with distances d1, d2, and d3 from D to A, B, and C respectively. Use the formula: Work = (charge at D) × (potential at D due to charges at A, B, and C).
A
-q * (q / (4 * π * ε0) * (1/d1 - 1/d2 + 1/d3))
B
-q * (q / (4 * π * ε0) * (1/d1 + 1/d2 - 1/d3))
C
-q * (q / (4 * π * ε0) * (1/d1 + 1/d2 + 1/d3))
D
-q * (q / (4 * π * ε0) * (1/d1 - 1/d2 - 1/d3))
Correct Answer
Option A
Detailed Explanation
The potential at D due to charges at A, B, and C is calculated using the formula: q / (4 * π * ε0) * (1/d1 - 1/d2 + 1/d3). Multiplying by the charge -q at D gives the work done.
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