MHT CET · Physics · Current Electricity
A 2.5 V battery is connected to a potentiometer wire. A cell of e.m.f. 1.08 V is balanced by the voltage drop across 2.16 m of wire. The length of the potentiometer wire is
- A 2.5 m
- B 3 m
- C 5 m
- D 6 m
Answer & Solution
Correct Answer
(C) 5 m
Step-by-step Solution
Detailed explanation
\( k = \frac{E_C}{L_C} = \frac{1.08 \, \text{V}}{2.16 \, \text{m}} = 0.5 \, \text{V/m} \) \( L_T = \frac{V_B}{k} = \frac{2.5 \, \text{V}}{0.5 \, \text{V/m}} \)
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