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Moving Charges and Magnetism question

2014 · Q125
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Moving Charges and Magnetism question

2014 · Q125

NEETPhysicsMoving Charges and MagnetismMCQ+4 / −1
In an ammeter 0.2% of main current passes through the galvanometer. If resistance of galvanometer is G, the resistance of ammeter will be
  1. A
    1499G{1 \over {499}}G4991​G
  2. B
    499500G{{499} \over {500}}G500499​G
  3. C
    1500G{1 \over {500}}G5001​G
  4. D
    500499G{{500} \over {499}}G499500​G
View written solutionFree

Correct answer: C

In parallel arrangement, I α\alphaα R

Now G/S = 99.8/0.2

S = G/499

Hence, RA=GSG+S=G500{R_A} = {{GS} \over {G + S}} = {G \over {500}}RA​=G+SGS​=500G​

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