The movement of pointer in the Aneroid barometer when atmospheric pressure decreases will be towards

Right

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Left

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Upwards

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Downwards

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Solution

The correct option is B Left
When atmospheric pressure decreases, the diaphragm of the box in which spring is kept bulges out and the wheel rotates in anticlockwise direction, and thus pointer move towards the left. The barometer is thus calibrated accordingly as shown.

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Aneroid barometer can be used to measure very minute changes in pressure.

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