Three 2V cells are connected in series and used as a battery in a circuit.
  1. What is the p.d. at the terminals of the battery?
  2. How many joules of electrical energy does 1C gain on passing through
  1. One cell.
  2. All three cells?
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  1. If three cells of 2 volt each are connected in series to make a battery, then the total potential difference between terminals of the battery will be 6V.
  1.  
  1. Given: p.d. = 2V, Charge moved = 1C
We know that

Work done = p.d × charge moved

= 2 × 1

Work done = 2 joules
  1. Given: p.d = 6V, Charge moved = 1C
Work done = p.d × charge moved

= 6 × 1

Work done = 6 joule.
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