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Most Important Selected Qs for JEE AdvancedPhysicsCurrent Electricity

Paragraph: An ammeter and a voltmeter are connected in series to a battery with an emf of 10 V . When a certain resistance is connected in parallel with the voltmeter, the reading of the voltmeter decreases three times, whereas the reading of the ammeter increases the two times. Question: If resistance of the ammeter is 2 , then resistance of the voltmeter is :-

Options

  1. A1
  2. B2
  3. C3
  4. D4

Correct answer

C. 3

Step-by-step solution

V₁ V₂ = R_A R_V = 4 6 & R _ A =2 R _ v =3

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