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 ______.

पर्याय

• 2.8 ohms

• 1.4 ohms

• 1.2 ohms

• zero

Answer 1

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`