The current in the primary circuit of a potentiometer wire is 0.5 A, specific resistance…
Physics · JEE Main · NTA Exams — Current Electricity
The current in the primary circuit of a potentiometer wire is 0.5 A, specific resistance of wire is 4 × 10–7 Ω–m and area of cross-section of wire is 8 × 10–6 m2. The potential gradient in the wire would be
- 2.5 mV/metre
- 25 mV/metre
- 25 V/metre
- 10 V/metre
Answer
(B) 25 mV/metre
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