List of top Physics Questions asked in Rajasthan PMT

A ball is thrown upwards, it takes $4 s$ to reach back to the ground. Find its initial velocity :

A ball is thrown from height $h$ and another from $ 2h $ The ratio of time taken by the two balls to reach ground is:

A particle executing SHM has amplitude $0.01$ and frequency $60\, Hz$. The maximum acceleration of the particle is:

When the kinetic energy of a body executing S.H.M. is $1 / 3$ of the potential energy. The displacement of the body is $x$ percent of the amplitude, where $x$ is :

$700\, pF$ capacitor is charged by $50\, V$ battery. Electrostatic energy is stored by it will be :

The functions of moderators in nuclear reactor is to:

The velocity of bullet is reduced from $200\, m / s$ to $100\, m / s$ while travelling through a wooden block of thickness of $10\, cm$. The retardation assuming to be uniform, will be :

The peak value of $AC$ voltage on a $220\, V$ mains is:

The half-life period of radium is $1580$ years. It remains $1/16$ after the years:

Assuming earth to be sphere of uniform density what is the value of acceleration due to gravity at a point $100\, km$ below the earth surface (Given $R=6380\,\times 10^{3}\,m$)

An astronomical telescope has two lenses of focal powers $0.5\, D$ and $20\, D$. Then its magnifying power will be :

A nuclei $X$ with mass number $A$ and charge number $Z$, disintegrates into one $\alpha$-particle and one $\beta$-particle. The resulting nuclide $R$ has atomic mass and atomic number, equal to :

A hot electric iron has a resistance of $80\, \Omega$ and is used on a $200\, V$ source. The electrical energy spent, if it is used for $2\, hr$, will be :

A concave mirror of focal length $15\, cm$ forms an image having twice the linear dimension of the object. The position of the object when the image is virtual will be:

A black body is heated from $27^{\circ} C$ to $927^{\circ} C$ the ratio of radiations emitted will be :

If the equation of motion of standing waves is $y=0.3 \sin (314\, t-1.57\, x)$, then the velocity of standing wave will be :

A boy of $50\, kg$ is standing in a left moving down with acceleration $ 9.8\,m/s^{2}$ . The apparent weight of the boy is:

The weight of an object at earth's surface is $700\, g\, wt$. What will be its weight at the surface of a planet whose radius is $1 / 2$ and mass is $1 / 7$ of that of the earth ?

The velocity of all radio waves in free space is $3 \times 10^{8} m / s$. The frequency of a radio wave of wavelength $150\, m$ is :

A $120\, m$ long train is moving towards west with a speed of $10\, m / s$. A bird flying towards east with a speed of $3\, m / s$ crosses the train. The time taken by the bird to cross the train will be :

Out of the given bodies (of same mass) for which the moment of inertia will be maximum about the axis passing through its centre of gravity and perpendicular to its plane?

The distance between the ends of wings of an aeroplane is $5\, m$. The aeroplane is moving with velocity of $200\, km/sec$ in a magnetic field of $10\, T.$ The emf induced across the ends of wings will be:

A spring executes SHM with mass of $10 \,kg$ attached to it. The force constant of spring is $10\, N / m$. If at any instant its velocity is $40 \,cm / sec$, the displacement will be (where amplitude is $0.5 \,m$ ) :

How is the time period of simple pendulum vary with its amplitude?

The separation between the two charges $ +q $ and $ -q $ becomes double. The value of force will be: