Which is the corerct way to avoid a damage in the moving coil galvanometer?

A thin copper strip is connected in series with the coil.

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A thick copper strip is connected in parallel with the coil.

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A thick copper strip is connected in series with the coil.

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A thin copper strip is connected in parallel with the coil.

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Solution

The correct option is B A thick copper strip is connected in parallel with the coil.
To avoid the galvanometer from these possible damages, a thick strip of copper is connected in parallel with the coil. It is known as shunt. Its resistance is very small as compared to the resistance of the coil. Therefore, most part of the current goes through this shunt and only a very small part the current goes through the coil. In this way chances of damage to the coil or pointer is avoided.

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