JEE Main & Advanced
Sample Paper
JEE Main Sample Paper-11
question_answer
In the figure (i) as extensible string is fixed at one end and the other end is pulled by a tension T. In figure (ii) another identical string is pulled by tension T at both the ends. The ratio of elongation in equilibrium of string in (i) to the elongation of string in (ii) is
A) 1 : 1
B) 1 : 2
C) 2 : 1
D) 0
Correct Answer:
A
Solution :
Tension in both strings shall be same which can be observed by making FBD of string in figure (i). FBD of string in figure (i)