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QJEEM19Ph2823: JEE Main 2019 Physics - Class 12 JEEM19Ph2823 Solution: The resistance of a galvanometer is 50 ohm and the maximum…

The resistance of a galvanometer is 50 ohm and the maximum current which can be passed through it is 0.002 A. What resistance must be connected to it in order to convert it into an ammeter of range 0 – 0.5 A ?

Multiple Choice Options

  • A 0.02 ohm
  • B 0.2 ohm
  • C 0.002 ohm
  • D 0.5 ohm

Step-by-Step Verified Solution

JEE Main 2019 (Online) 9th April Evening Slot Physics - Current Electricity Question 241 English Explanation

We have
Ig Rg = (0.5 – Ig) S

⇒\Rightarrow (0.002) (50) = (0.5 – Ig) S

⇒S≃0.002×500.5=0.2Ω\Rightarrow S \simeq {{0.002 \times 50} \over {0.5}} = 0.2\Omega

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