In the given figure, if we immersed the block into the water then what will happen to the reading on the spring balance?

It will increase

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It will decrease

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There will be no change in the reading

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First increases then decreases

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Solution

The correct option is B
It will decrease

When the block is immersed in the water, the water will apply up thrust on the block. This upthrust will be in the upward direction and the value will be equal to the weight of the water displaced by the block. Hence, the block will feel light due to up thrust and the reading will decrease.

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