A wire elongates by 1.0 mm when a load W is hanged from it. If this wire goes over a pulley and two weights W each are hung at the two ends, the elongation of the wire will be
(a) 0.5 m
(b) 1.0 mm
(c) 2.0 mm
(d) 4.0 mm
Correct option (b) 1.0 mm
Explanation:
Elongation in the wire ∝ Tension in the wire In first case T1 = W and in second case
