Q239 / 240 · KCET 2026 · Physics

A $200$ J of work is done in moving a charge $5$ C from a point A where the potential is $-20$ V to another point B where potential is V volt. The value of V at B is

  • A
    $10$ V
  • Correct answer
    B
    $20$ V
  • C
    $40$ V
  • D
    $60$ V

Solution

The work done in moving a charge $q$ from point A to point B is given by $W = q(V_B - V_A)$.

Substituting the given values:

$200 = 5(V - (-20))$

$200 = 5(V + 20)$

$V + 20 = 40$

$V = 20$ V

Answer: $20$ V

Hence, the correct answer is option: 'B'.

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