List of top Physics Questions asked in Haryana PMT

The formula for horizontal range of a projectile is $S=\frac{v^{2}\sin ^{2}\theta }{2g}$ where $v$ is initial speed, $ \theta $ angle of inclination and $g$ is acceleration due to gravity. The Wheatstone bridge shown in figure can be used to determine the range if the following arrangement is made
With the rise of temperature the resistivity of a semiconductor
If $a_1$ and $a_2$ are two non-collinear unit vectors and if $|a_1 + a_2| = \sqrt3$ ,then the value of $(a_1 - a).(2a_1 + a_2)$ is
Damping on sharpness of resonance has
In a stationary wave represented by $Y =2 a \cos kx \sin \omega t$ the intensity at a certain point is maximum when
Each of the properties if sound in List-I primarily depends on one of the quantities in List-II. Select the correct answer (matching List-I with List-II) as per code given below the lists:
One of the causes of the breadth of the spectral lines is
In the circuit shown the equivalent resistance between $A$ and $B$ is
Gravitational field is
According to Bohrs theory of hydrogen atom, for the electron in the $n^{\text {th }}$ allowed orbit the (i) linear momentum is proportional to $1 / n$ (ii) radius is proportional to $n$ (iii) kinetic energy is proportional to $1 / n^2$ (iv) angular momentum is proportional to $n$ Choose the correct option from the codes given below:
The energy of an X-ray photon of wavelength $1\, ?$ is $\left( h =6.6 \times 10^{34} J - s \right)$
According to Maxwells law of distribution of velocities of molecules, the most probable velocity is
Good emitters are good absorbers is a statement concluded from
A body of mass $3 \,kg$ is under a constant force which causes a displacement s in metre in it, given by the relation $s=\frac{1}{3}t^2$, where $t$ is in second. Work done by the force in $2 s$ is
An electric dipole of moment $p$ is Iying along a uniform electric field $E$. The work done in rotating the dipole by $90^{\circ}$ is
Two sound waves with wavelength $5.0 \,m$ and $5.5 \,m$ respectively, each propagate in a gas with velocity $330 \,m/s$. We expect the following number of beats per second
Alternating current cannot be measured by $D.C.$ ammeter because
A transverse wave propagating along x-axis is represented by $ y(x,t)=8.0\sin \left( 05\pi x-4\pi t-\frac{\pi }{4} \right) $ where $x$ is in metre and $t$ is in second. The speed of the wave is
A microscope is focused on a mark on a piece of paper and then a slab of glass of thickness $3 \,cm$ and refractive index $1.5$ is placed over the mark. How should the microscope be moved to get the mark in focus again?
The binding energy of deuteron is $2.2 \,MeV$ and that of $ _{2}^{4}He$ is $28 \,MeV$. If two deuterons are fused to form one $ _{2}^{4} He$, then the energy released is
Two cells, having the same emf, are connected in series through an external resistance $R$. Cells have internal resistances $ r_{1} $ and $ r_{2} $ $ (r_{1} > r_{2}), $ respectively. When the circuit is closed, the potential difference across the first cell is zero. The value of $R$ is
A Carnot engine whose sink is at $300 \,K$ has an efficiency of $40\%$. By how much should the temperature of source be increased so as to increase its efficiency by $50\%$ of original efficiency?
A transistor-oscillator using a resonant circuit with an inductor $L$ (of negligible resistance) and a capacitor $C$ in series produce oscillations of frequency $ f $ . If $L$ is doubled and $C$ is changed to $4C$, the frequency will be
Two masses $ m_{1}=5\,kg $ and $ m_{2}=4.8\,kg $ tied to a string are hanging over a light frictionless pulley. What is the acceleration of the masses when lift is free to move ? $ (g=9.8 \, m/s^{2}) $
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 :-