For a cell, the terminal potential difference is 2.2 V when the circuit is open and is reduced to 1.8 V when the cell is connected to a resistance R = 5 Ω . Determine the internal resistance of the ce

Question

For a cell, the terminal potential difference is 2.2 V when the circuit is open and is reduced to 1.8 V when the cell is connected to a resistance R = 5 Ω . Determine the internal resistance of the cell.

TestHub · Accepted Answer

When the circuit is open, Potential Difference = E = 2.2 V i = 2.2 r + 5 Potential difference across cell = E - i r 1.8 = 2.2 - 2.2 r + 5 × r ⇒ 2.2 r r + 5 = 0.4 ⇒ r = 2 1.8 = 10 9 Ω

Physics - Current Electricity Question with Solution | TestHub

Options:

Doubts & Discussion