Fundamentholfundamenthol
JEE Main2019Physics
Q.

A moving coil galvanometer allows a full scale current of 10–4 A. A series resistance of 2 M is required to convert the above galvanometer into a voltmeter of range 0 – 5 V. Therefore the value of shunt resistance required to convert the above galvanometer into an ammeter of range 0–10 mA is :

  1. A

  2. B

  3. C

  4. D

    Not Possible

Solution

ig =0.1 Ma           V = 5V                  R = 2 × 106

V = ig(G + R)

5 = 0.1 × 10-3 (G + R)

G + R = 5 × 104

G = 5 × 104 - 2 × 106

= Negative

Not Posible   

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