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In a potentiometer experiment, the balancing length for a cell of EMF $\varepsilon_1 = 1.5 \, \text{V}$ is $l_1 = 300 \, \text{cm}$. If the cell is replaced by another cell of EMF $\varepsilon_2 = 2.5 \, \text{V}$, what will be the new balancing length $l_2$?
- A.$400 \, \text{cm}$
- B.$500 \, \text{cm}$
- C.$600 \, \text{cm}$
- D.$450 \, \text{cm}$
Show correct answer & step-by-step solution
Correct answer: B — $500 \, \text{cm}$
Solution
Using , we get . Solving for gives .
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