Question

A silver ingot weighing 2.1 kg is held by a string so as to be completely immersed in a liquid of relative density 0.8. The relative density of silver is 10.5. The tension in the string in kg-wt is

• A. 1.6
• B. 1.94
• C. 3.1
• D. 5.25

Answer 1

The correct option is B

1.94

Apparent weight = $V(\rho -\sigma )g=\frac{M}{\rho }(\rho -\sigma )g$

$=M⟮1-\frac{\sigma }{\rho }⟯g=2.1⟮1-\frac{0.8}{10.5}⟯g=1.94gN$

$=1.94Kg-wt$