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Question

What is the work done in moving a charge of  0.4 C across two points having a potential difference of 8 V?


  1. 3.2 J
  2. 0.2 J
  3. 0.4 J
  4. 1.2 J


Solution

The correct option is A 3.2 J

The potential difference (V) between two points is the amount of work done (W) in moving a unit positive electric charge(q) from one point to another in a current carrying conductor.
 V=Wq
W=V×q
Given: q=0.4 C
           V=8 V
Therefore, the work done in moving the charge =8 V×0.4 C=3.2 J

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