First slide

Tangent Galvanometer

Question

A galvanometer of resistance 200 $Ω$ gives full scale deflection with 15 milli-ampere current. In order to convert it into a 15 V range voltmeter, the value of resistance connected in series is

Easy

A

800 $Ω$
B

1000 $Ω$
C

1500 $Ω$
D

2500 $Ω$

Solution

We know that
$\begin{array}{l} R = (\frac{V}{i_{g}}) - G = (\frac{15}{15 \times 10^{- 3}}) - 200 \\ ∴ R = 800 Ω \end{array}$

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