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AP EAMCET202423 May 2024Morning ShiftPhysicsMathematics in PhysicsActual

The emf of a cell of internal resistance 2 is measured using a voltmeter of resistance 998 . The error in the emf measured is

Options

  1. A0.4 %
  2. B4 %
  3. C2 %
  4. D0.2 %

Correct answer

D. 0.2 %

Step-by-step solution

The reading of voltmeter, aligned & V=I R & V= ( E 998+2 ) 998 & =0.998 E aligned % error in emf, aligned & % E= E-V E 100= E-0.998 E E 100 & =0.2 % aligned

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