List of top Physics Questions asked in Haryana PMT

The earth is assumed to be a sphere of radius $R$. A platform is arranged at a height $R$ from the surface of the earth. The escape velocity of a body from this platform is $fv$, where $v$ is its escape velocity from the surface of the Earth. The value of $f$ is :-

The radius of a spherical drop of water is $1 \,mm$. If surface tension of water be $70\times10^{-3} Nm^{-1},$ the pressure difference inside and outside the drop will be

If coefficient of static friction is $\mu_{s}$, and coefficient of kinetic friction is $\mu_{k}$, which is correct?

Which motion does not require force to maintain it?

In a semiconductor electron concentration is $7 \times 10^{13} \,cm ^{-3}$ and hole concentration is $5 \times 10^{12} \,cm ^{-3}$. Then the semiconductor is

If average velocity becomes $4$ times then what will be the effect on rms velocity at that temperature?

In a potentiometer the null point is obtained at $7^\text{th}$ wire. If now we have to change the null point at $9^\text{th}$ wire, what should we do?

The earth moves in an elliptical orbit with the sun $S$ at one of foci as shown in the figure. Its rotational kinetic energy is maximum at the point

Reverberation time does not depend upon

The output is low when either of the input is high, then this represents which of the following gates?

If $B_{H}=\frac{1}{\sqrt{3}} B_{v}$, find angle of dip. (where symbols have their usual meanings)

A heavy stone hanging from a massless string of length $15\, m$ is projected horizontally with speed $147\, m/ s$. The speed of the particle at the point where the tension in the string equals the weight of the particle is?

A ball is projected upwards from a height h above the surface of the earth with velocity v. The time at which the ball strikes the ground is

The coefficient of apparent expansion of a liquid when determined using two different vessels A and B are $\gamma_1$ and $\gamma_2$ respectively. If the coefficient of lenses expansion of vessel A is $\alpha$. The coefficient of lenses expansion of the vessel B is

A body initially at rest is moving with uniform acceleration $a$. Its velocity after $n\, s$ is $v$. The displacement of the body in $2\, s$ is :

The magnetic force on a point charge is $\vec{ F }= q (\vec{ V } \times \vec{ B })$ Here, $q=$ electric charge $\vec{ V }=$ velocity of point charge $\vec{ B }=$ magnetic Held The dimension of $\vec{B}$ is :

The first diffraction minimum due to single slit diffraction is $\theta$ , for a light of wavelength $5000\,?$. If the width of the slit is $1\times 10^{-4},$ then the value of $\theta$ is :

Two stones are projected with same velocity $v$ at an angle $\theta$ and $(90-\theta)$. If $H$ and $H_{1}$ are the greatest heights in the two paths, what is the relation between $R , H$ and $H_{1}$ ?

A velocity of a particle at an instant is $10\, m / s$. After $3\, s$ its velocity will become $16\, m / s$. The velocity at $2\, s$, before the given instant will be :

A weight $w$ is suspended from the midpoint of a rope, whose ends are at the same level. In order to make the rope perfectly horizontal, the force applied to each of its ends must be:

A particle moves with a velocity $(5i -3j + 6k) ms^{-1}$ undre the influence of a constant force $F=(10 i +10 j +20 K)N .$ The instantaneous power applied to the particle is

Two coherent sources of intensity ratio $\beta$ interfere. Then the value of $(I_{\max }-I_{\min })/(I_{\max }+I_{\min })$ is:

The factor responsible for lower mercury level ina capillary tube is

The charge on capacitors in the following figure is

The force required to just move a body up an inclined plane is double the force required to just prevent it from sliding down. If $\theta$ is the angle of friction and $\theta$ is the angle which the plane makes with the horizontal, then :