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MHT CET202310 May 2023Morning ShiftPhysicsCurrent ElectricityActual

A voltmeter of resistance 150 connected across a cell of e.m.f. 3 ~V reads 2.5 ~V . What is the internal resistance of the cell?

Options

  1. A10
  2. B15
  3. C20
  4. D30

Correct answer

D. 30

Step-by-step solution

Internal resistance, aligned r & = [ E V -1 ] R & = [ 3 2.5 -1 ] 150 & =30 aligned

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