Question

How much force is required to produce an increase of 0.2% in the length of a brass wire of diameter 0.6

mm? (Young’s modulus for brass = 0.9 x 1011 N / m2)

(a) nearly 17 N

(b) nearly 34 N

(c) nearly 51 N

(d) nearly 68 N​

Answer 1

Answer:

option c 51 n

Explanation:

51n is the ans

Answer 2

Answer:

Y=

l

Δl

F/A

F=

l

YAΔl

F=Y.πr

2

l

Δl

F=0.9×10

11

×3.14×(

2

0.6

×10

−3

)

2

×

100

0.2

option c

F=0.9×10

11

×3.14××0.09×10

−6

×2×10

−3

F=51N