First slide

voltmeter

Question

A galvanometer of resistance $2 Ω$ and having full scale deflection for a current of 100 mA can be converted into a voltmeter of range 5 V by connecting a resistance R in series with the galvanometer. The resistance R in ohm is :

Moderate

A

98
B

52
C

50
D

48

Solution

$\begin{array}{l} (\frac{5}{2 + R}) = 100 \times 10^{- 3} \\ \Rightarrow R = 48 Ω \end{array}$

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