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Standard XII

Physics

Galvanometer

A galvanomete...

Question

A galvanometer has a coil resistance R and a safe current of i. If it is to be converted into an ammeter with a range of n i, then the resistance to be connected is

R/(n-1) in series

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R(n- 1) in series

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R(n - 1) in parallel

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R/(n - 1) in parallel

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Solution

The correct option is A R/(n - 1) in parallel
$S = \frac{i_{g} G}{(i - i_{g})}$ (using the standard result)
$S = \frac{i R}{(n i - i)}$
$S = \frac{R}{(n - 1)}$

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A galvanometer has a coil resistance R and a safe current of i. If it is to be converted into an ammeter with a range of n i, then the resistance to be connected is

The correct option is A R/(n - 1) in parallelS=igG(i−ig) (using the standard result)S=iR(ni−i)S=R(n−1)

The correct option is A R/(n - 1) in parallel
$S = \frac{i_{g} G}{(i - i_{g})}$ (using the standard result)
$S = \frac{i R}{(n i - i)}$
$S = \frac{R}{(n - 1)}$