A wire elongates by 
when a load 
is hanged from it. if the wire goes over a pulley and two weights 
each are hung at the two ends, the elongation of the wire will be (in 
)
A
B
zero
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Elongation in the wire 
Elongation in the wire 
Tension in the wire
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.
Voltage across bulb before heater is switched on,
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