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 $$= 0.9 \times 10^{11} N / m^2$$)

A
Nearly 17 N
B
Nearly 34 N
C
Nearly 51 N
D
Nearly 68 N

Solution

## The correct option is B Nearly $$51\ N$$From Young's modulus relation,$$Y=\dfrac{F/A}{\Delta L/L}$$$$\implies F=YA(\dfrac{\Delta L}{L})$$$$=0.9\times 10^{11}\times \pi (0.0003)^2\times 0.002=50.8\ N\approx 51\ N$$Physics

Suggest Corrections

0

Similar questions
View More

People also searched for
View More