Question

A silver ingot weighting 2.1 kg is hold by a string so as to be completely immersed on 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

The Apparent weight of the silver will be

$V(\rho -\sigma )g=\frac{M}{\rho }(\rho -\sigma )g$
$=M(1-\frac{\sigma }{\rho })g$

$=2.1(1-\frac{0.8}{10.5})g$

$=1.94gN$
$=1.94Kg-wt$ thus the tension in the string will be 1.94kg-wt