First slide

Physical quantities and units

Question

Young modulus of steel is $1.9 \times 10^{11} N / m^{2} .$ When expressed in CGS units of $d y n e / c m^{2},$ it will be equal to $(1 N = 10^{5} d y n e, 1 m^{2} = 10^{4} c m^{2})$

Moderate

A

$1.9 \times 10^{10}$
B

$1.9 \times 10^{11}$
C

$1.9 \times 10^{12}$
D

$1.9 \times 10^{13}$

Solution

Young modulus $Y = 1.9 \times 10^{11} N / m^{2}$
$∵ 1 N = 10^{5} d y n e, 1 m^{2} = 10^{4} c m^{2}$
So in CGS $Y = \frac{1.9 \times 10^{11} \times 10^{5}}{10^{4}} d y n e / c m^{2}$
$Y = 1.9 \times 10^{12} d y n e / c m^{2}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App