Question

The uniform wire of 20 cm long is bent into a circle. It is placed gently on the surface of water of surface tension $0.07{Nm}^{-1}$. The extra force than its weight required to pull it out of the water is

• A. 0.014 N
• B. 0.028 N
• C. Zero
• D. 0.0035 N

Answer 1

The correct option is A 0.014 N

$\text{We knows}$

$f=TL$

$f=0.07\times 0.2$

$=0.014N$

$\text{Answer:-}\left(A\right)$