Question 1 :
For a floating body, its weight W and upthrust FB on it are related as listed below:
Question 2 :
The force experienced by a body when partially or fully immersed in water is called :
Question 3 :
The pressure {tex}P_1{/tex} at the top of a dam and {tex}P_2{/tex} at a depth h form the inside water (density p) are related as :
Question 4 :
Relative density of a substance is expressed by comparing the density of that substance with the density of :
Question 6 :
A car starting from rest acquires a velocity {tex} 180 \mathrm { ms } ^ { - 1 } {/tex} in {tex} 0.05 \mathrm { h } {/tex}. Find the acceleration.
Question 7 :
A body dropped from the top of a tower reaches the ground in 4s. The height of the tower is
Question 8 :
A car is moving with a velocity {tex} 20 \mathrm { ms } ^ { - 1 } {/tex}. When the brakes are used it is retarded at a rate of {tex} 2 \mathrm { ms } ^ { - 2 } . {/tex} What will the velocity after {tex} 5 \mathrm { s } {/tex} of applying the brakes?
Question 10 :
A motor bike of mass {tex} 100 \mathrm { kg } {/tex} is running at {tex} 10 \mathrm { ms } ^ { - 1 } {/tex}. If the engine develops an extra linear momentum of {tex} 3000 \mathrm { N } . \mathrm { s } {/tex}, calculate the final velocity of the motorbike.
Question 12 :
An object falling freely from rest reaches ground in 2 s. If acceleration due to gravity is 9.8 m s{tex}^{-2}{/tex}, then the velocity of object on reaching the ground will be as shown below:
Question 13 :
A concave mirror is made by cutting a portion of a hollow glass sphere of radius 30 {tex} \mathrm{cm} {/tex}. The focal length of the concave mirror is :
Question 15 :
For an incident ray directed towards centre of curvature of a spherical mirror the reflected ray:
Question 16 :
A ray of light is incident on a concave mirror. If it is parallel to principal axis, the reflected ray will :
Question 23 :
The insulator of electricity is which of the following materials listed below:
Question 24 :
In a metallic conductor, electric current is thought to be due to movement of :
Question 26 :
Current in a circuit flows in which of the following directions listed below:
