Physics 1st Paper MCQ-Cumilla Board-2022

1. At the cquator gravitational the acceleration due to gravity is $g^{\prime}$, then-

2. If the radius of the carth is $R$, at which height the value of $g$ will be half of the value on the earth surface?

3. How times the length will be increased if the area of cross-section is $2 \mathrm{~mm}^{2}$ and the force is twice?

4. Impulse of force is -

i. a product of a force and the duration of action of the force

ii. the change of mementum

iii. the rate of changes of momentum

Which one is correct?

5. At N.T.P. the density of hydrogen is $0.09 \mathrm{kgm}^{-3}$. Determine the root mean square velocity of molecules.