Physics Test 13

Result

Physics Test 13

Score
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Question 1
4 / -1

Statement–1: If a metal wire is attached to the ceiling of a room and mass m is attached to another end, the energy stored in the stretched wire is mgl/2 where $Description: D:\GradeStack Courses\JEE Mains (Sent by Ravi)\JEE Mains Full Test\AIEEE-Full-Test-2-New_files\image101.png$ is the increment in length of wire.
Statement–2: In the above statement loss in gravitational energy is mg $Description: D:\GradeStack Courses\JEE Mains (Sent by Ravi)\JEE Mains Full Test\AIEEE-Full-Test-2-New_files\image101.png$ while the loss in energy to surrounding is mgl/2.

A
Statement–1 is True, Statement–2 is True Statement–2 is a correct explanation for Statement–1.

B
Statement–1 is True, Statement–2 is True; Statement–2 is NOT a correct explanation for Statement–1.

C
Statement–1 is True, Statement–2 is False.

D
Statement–1 is False, Statement–2 is True.

Solution

Work done in stretching wire 1/2mgl. And all the energy corresponds to the potential energy of the metal wire.