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Question

If 24 joules of work is done in moving a charge of 2 coulombs across two points, then what will be the correct voltage across these two points?

This question was previously asked in
RRB NTPC 2024 Undergraduate CBT 1 Question Paper (29-Aug-2025) (Shift 1)
The correct answer is

12 V

The relationship between work done (W), charge (Q), and voltage (V) is given by the equation:

\(W = VQ\)

Where:

  • W is the work done in Joules (J)
  • V is the voltage in Volts (V)
  • Q is the charge in Coulombs (C)

We are given:

  • W = 24 J
  • Q = 2 C

We need to find V. Rearranging the equation, we get:

\(V = \frac{W}{Q}\)

Substituting the given values:

\(V = \frac{24 J}{2 C} = 12 V\)

Therefore, the voltage across the two points is 12 V.

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