A cell of internal resistance 3 Ω and emf 10 V is connected to a uniform wire of length 500 cm and resistance 3 Ω. The potential gradient in the wire is
Total resistance is 6Ω, current is 5/3 A, potential drop across the wire is 5V and the potential gradient is 10 mV/cm. Correct answer: (b) 10 mV/cm.
Class 12th Science Physics NCERT MCQ Questions
NCERT Books MCQ Questions Session 2024-2025.
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The total resistance in the circuit is Rcell+Rwire = 3Ω + 3Ω = 6Ω
The current is I = 10V/6Ω = 5/3 A. The potential gradient is V/L = IR/500 = 5/3 3/500 = 10 mV/cm. Answer: (b).
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