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QJEEM19Phd6eb: JEE Main 2019 Physics - Class 12 JEEM19Phd6eb Solution: A galvanometer, whose resistance is 50 ohm, has 25 divisions in …

A galvanometer, whose resistance is 50 ohm, has 25 divisions in it. When a current of 4 ×\times 10–4 A passes through it, its needle ( pointer) deflects by one division. To use this galvanometer as a voltmeter of range 2.5 V, it should be connected to a resistance of :

Multiple Choice Options

  • A 200 ohm
  • B 250 ohm
  • C 6200 ohm
  • D 6250 ohm

Step-by-Step Verified Solution

Ig = 4 ×\times 10 −- 4 ×\times 25 = 10 −- 2 A

JEE Main 2019 (Online) 12th January Evening Slot Physics - Current Electricity Question 251 English Explanation

2.5 = (50 + R) 10 −- 2

∴\therefore    R = 200 Ω\Omega

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