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Question
A straight line plot showing the terminal potential difference (V) of a cell as a function of current (I) drawn from it, is shown in the figure. The internal resistance of the cell would be then ______.
Options
2.8 ohms
1.4 ohms
1.2 ohms
zero
MCQ
Fill in the Blanks
Solution
A straight line plot showing the terminal potential difference (V) of a cell as a function of current (I) drawn from it, is shown in the figure. The internal resistance of the cell would be then 2.8 ohms.
Explanation:
I = O, V = E, ∴ E = 5.6 V
r = `"E"/"I" = 5.6/2.0 = 2.8 Omega`
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