The emf of cell is balanced by balancing length 450 cm . When the resistance of `10 Omega` is connected across the cell, balancing length changes by 1

Question

The emf of cell is balanced by balancing length 450 cm . When the resistance of `10 Omega` is connected across the cell, balancing length changes by 1

The emf of cell is balanced by balancing length 450 cm . When the resistance of `10 Omega` is connected across the cell, balancing length changes by 100 cm. The internal resistance of a cell is
A. `1.8Omega`
B. `2.8Omega`
C. `3.8Omega`
D. `2.5Omega`

Monjur Alahi

7 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 - B
`r_(1)=((l_(1)-l_(2))/(l_(2)))R=(450-350)/(350)xx10=(1000)/(350)`
`=2.8 Omega`

7 views Answered 2023-02-05 15:29