Current Electricity
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current-electricity Question 18
Question: Q. 5. The figure shows a plot of terminal voltage ’ $V$ ’ versus the current ’ $i$ ’ of a given cell. Calculate from the graph (i) emf of the cell and (ii) internal resistance of the cell.
U] [O.D. Comptt. I, II, III 2017]
Show Answer
Solution:
Ans. Emf of cell
Internal resistance
(ii)
$E=V$ for $I=0$
$E=6 \mathrm{~V}$
$E=V+i r$
$6=4+r$
$r=2 \Omega$
[CBSE Marking Scheme, 2017]
