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JAMB Physics 1997 Question 42

Question 42

Electrostatics

If 8 × 10−2 J of work is required to move 100 μC of charge from a point X to a point Y in an electrical circuit, the potential difference between X and Y is

  1. A.4.0 × 102 V
  2. B.4.0 × 104 V
  3. C.8.0 × 102 V
  4. D.8.0 × 104 V
Show the answer and explanation

Answer: C (8.0 × 102 V)

Explanation

V = W/Q = 8 × 10−2 ÷ (100 × 10−6) = 800 V = 8.0 × 102 V.