Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Units and Measurements

Question:

To determine the Young's modulus of a wire, the formula is Y = \(\frac{F}{A}\) x \(\frac{L}{\Delta L}\); where L = length, A = area of cross section of the wire, \(\Delta L\) = change in the length of the wire when stretched with a force F. the conversion factor to change it from CGS to MKS system is : 

Options:

1

10

0.1

0.01

Correct Answer:

0.1

Explanation:

Y = \(\frac{F}{A}\) x \(\frac{L}{\Delta L}\)

   = \(\frac{dyne}{cm^2}\)

   = \(\frac{10^{-5}N}{10^{-4}m^2}\)

   = 0.1 N/m2