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In the given figure the work done by the battery after the switch S is closed is

Options

  1. A1 0 0 μ J
  2. B- 1 0 0 μ J
  3. C8 0 μ J
  4. D- 8 0 μ J

Correct answer

C. 8 0 μ J

Step-by-step solution

Before the switch S is closed Q i = C eq V = 5 × 4 = 2 0 μ C When the switch S is closed Q f = CV = 1 0 × 4 = 4 0 μ C W cell = Δ QE = Q f - Q i × E = 2 0 × 4 = 8 0 μ J

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