A stel wire on Lingth 3.5 m and dress
sectional area 2x10-5 m stretches by the
same amount as a copper wire con
Jingh 2.5m and cross sectional crea
3.2 x 10*5m2 under a given load Whal
do the salio of Young's modulus
isteel to that of copper ?
of
Answers
Answered by
0
Answer:
1.7
Explanation:
For copper wire, L
C
=3.5m,A
C
=4×10
−5
m
2
for steel wire, L
S
=4.5m,A
S
=3×10
−5
m
2
As Young's modulus, Y=
(ΔL/L)
(F/A)
As applied force F and extension ΔL are same for steel and copper wire
∴
ΔL
F
=
L
S
Y
S
A
S
=
L
C
Y
C
A
C
where the subscripts C and S refers to copper and steel respectively
∴
Y
C
Y
S
=
L
C
L
S
×
A
S
A
C
=
(3.5m)(3×10
−5
m
2
)
(4.5m)(4×10
−5
m
2
)
=1.7
Similar questions