In the experiment to establish the relation between the loss in weight of a body with the weight of water displaced by it, which is the correct precaution?

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The thread from which the body is suspended from the spring balance should be thick and twined.

You should observe the reading of the pointer of the spring balance only when it is stationary.

The body should touch the sides of the measuring cylinder.

You should observe the reading of the upper meniscus of water in the measuring cylinder.

answer is B.

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Detailed Solution

In the experiment to establish the relation between the loss in weight of a body with the weight of water displaced by it, one should observe the reading of the pointer of the spring balance only when it is stationary.
According to the Archimedes principle, "a body experiences an upthrust equal to the weight of the fluid displaced by the immersed component of the body whether it is entirely or partially immersed in the fluid." Therefore, one must ensure an accurate and acceptable reading from the spring balance while experimenting. The observations must be meticulously recorded for an experiment to produce correct findings. Therefore, the experimenter should wait for the spring balance to reach equilibrium or, to put it another way, wait until the spring balance is stationary.

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