In melde's experiment, the number of loops on the string changes from 5 to 4 , when the tension ine the string is increased by 0.018gm wt , then the initial tension in the string will be

Options

A. 3.2kg wt
B. 0.032kg wt
C. 0.018kg wt
D. 1.8 kg wt

Answer

B

Explanation

`T_1P_1^2 = T_2P_2^2`
`T_2= (T_1+0.018)`