The terminal potential difference for a cell is 8.5 V when current is 2A and 9 V when current is 1.5A. What is the internal resistance of cell ?

Question

The terminal potential difference for a cell is 8.5 V when current is 2A and 9 V when current is 1.5A. What is the internal resistance of cell ?

The terminal potential difference for a cell is 8.5 V when current is 2A and 9 V when current is 1.5A. What is the internal resistance of cell ?
A. `4Omega`
B. `2Omega`
C. `3Omega`
D. `1Omega`

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - D
`V_(1)=8.5V, I_(1)=2A, I_(2)=1.5A, V_(2)=9V, r=?`
`E=V-Ir`
Now `E=V_(1)-I_(1)r=V_(2)-I_(2)r`
`:.8.5-2r=9-1.5r`
`0.5=0.5r`
`:.r=1 Omega`.

5 views Answered 2023-02-05 15:29