A work of 
J is done on a wire of length 50 cm and area of cross-section 0.5
. If the Young’s modulus of the material of the wire is 
, then the wire must be
a)
Elongated to 50.1414 cm
b)
Contracted by 2.0 mm
c)
Stretched by 0.707 mm
d)
Of length changed to 49.293 cm
A work of J is done on a wire of length 50 cm and area of cross-section 0.5 . If the Young’s modulus of the material of the wire is , then the wire must be
a)
Elongated to 50.1414 cm
b)
Contracted by 2.0 mm
c)
Stretched by 0.707 mm
d)
Of length changed to 49.293 cm
Question ID - 56400 | SaraNextGen Top Answer
A work of J is done on a wire of length 50 cm and area of cross-section 0.5 . If the Young’s modulus of the material of the wire is , then the wire must be
a)
Elongated to 50.1414 cm
b)
Contracted by 2.0 mm
c)
Stretched by 0.707 mm
d)
Of length changed to 49.293 cm
|
A work of |
|||
|
a) |
Elongated to 50.1414 cm |
b) |
Contracted by 2.0 mm |
|
c) |
Stretched by 0.707 mm |
d) |
Of length changed to 49.293 cm |
1 Answer
127 votes
Answer Key / Explanation : (c) -
|
(c) The work done by wire is stored as potential energy in the wire
Given, Strain
? |
(stretched)127 votes
Answer Link
127