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KCET2025PhysicsElectrostatics

A potential at a point A is -3 V and that at another point B is 5 V . What is the work done in carrying a charge of 5 m C from B to A ?

Options

  1. A-0.04 J
  2. B-0.4 J
  3. C-4 J
  4. D-40 J

Correct answer

A. -0.04 J

Step-by-step solution

aligned & Wext =q V & =q (V_f-V_i ) & =5 10⁻³ (V_A-V_B ) & =5 10⁻³(-3-5) & =-8 5 10⁻³ ~J & =-40 10⁻³ ~J & =-0.04 ~J aligned

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