JEE Main & Advanced
Sample Paper
JEE Main - Mock Test - 35
question_answer
A wire elongates by i mm when a load W is hanged from it. If the wire goes over a pulley and two weights W each are hung at the two ends, the elongation of the wire will be (in mm)
A)\[2\ell \]
B) zero
C)\[\ell /2\]
D)\[\ell\]
Correct Answer:
D
Solution :
In first case and in second case As tension in the wire in both the cases are equal therefore elongation in the wire will be equal.