A spring balance A shows a reading of 2 kg, when an aluminium block is suspended from it. Another balance B shows a reading of 5 kg, when a beaker full of liquid is placed in its pan. The two balances are arranged such that the Al – block is completely immersed inside the liquid as shown in the figure. Then Options: A . &nbspThe reading of the balance A will be more than 2 kg B . &nbspThe reading of the balance B will be less than 5 kg C . &nbspThe reading of the balance A will be less than 2 kg. and that of B will be more than 5 kg D . &nbspThe reading of balance A will be 2 kg. and that of B will be 5 kg.

A spring balance A shows a reading of 2 kg, when an aluminium block is suspended

Question

A spring balance A shows a reading of 2 kg, when an aluminium block is suspended from it. Another balance B shows a reading of 5 kg, when a beaker full of liquid is placed in its pan. The two balances are arranged such that the Al – block is completely immersed inside the liquid as shown in the figure. Then

Options:

A . The reading of the balance A will be more than 2 kg

B . The reading of the balance B will be less than 5 kg

C . The reading of the balance A will be less than 2 kg. and that of B will be more than 5 kg

D . The reading of balance A will be 2 kg. and that of B will be 5 kg.

Answer: Option C
:
C
Due to buoyant force on the aluminium block the reading of spring balance A will be less than 2 kg but it increase the reading of balance B.

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