List of top Physics Questions asked in Rajasthan PMT

Three point charges $ +q,-2q $ and $ +q $ are placed at points $ (x=0,y=a,x=0), $ $ (x=0,y=0,z=0) $ and $ (x=a,y=0,z=0), $ respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are

Work done in placing a charge of $ 8\times 10^{-18}C $ on a condenser of capacity $100 \, \mu \, F$ is

Two spherical conductors B and C having equal radii and carrying equal charges in them repel each other with a force F when kept apart at some distance. A third spherical conductor having same radius as that of B but uncharged, is brought in contact with B, then brought in contact with C and finally removed away from both. The new force of repulsion between B and C is

The difference in the variation of resistance with temperature in a metal and a semiconductor arises essentially due to the difference in the

The length of a given cylindrical wire is increased by 100%. Due to the consequent decrease in diameter the change in the resistance of the wire will be

Diwali rocket is ejecting 50 g of gases/s at a velocity of 400 m/s. The accelerating force on the rocket will be

A metal wire of linear mass density of 9.8 g/m is stretched with a tension of 10 kg-wt between two rigid supports 1 m apart. The wire passes at its middle point between the poles of a permanent magnet and it vibrates in resonance when carrying an alternating current of frequency n. The frequency n of the alternating source is

A light spring balance hangs from the hook of the other light spring balance and a block of mass M kg hangs from the former one. Then the true statement about the scale reading is

A boy playing on the roof of a 10 m high building throws a ball with a speed of 10 m/s at an angle of $ 30{}^\circ $ with the horizontal. How far from the throwing point will the ball be at the height of 10 m from the ground? $ (g=10\,m/{{s}^{2}},\,\sin {{30}^{o}}=1/2,\,\cos {{30}^{o}}=\sqrt{3}/2) $

The maximum number of possible interference maxima for slit-separation equal to twice the wavelength in Youngs double-slit experiment, is

What is the value of inductance L for which the current is a maximum in a series LCR circuit with $ C=10\,\mu F $ and $ \omega =1000\,{{s}^{-1}} $ ?

Spherical balls of radius R are falling in a viscous fluid of viscosity n with a velocity v. The retarding viscous force acting on the spherical ball is

A ball is thrown from a point with a speed $ {{v}_{0}} $ at an angle of projection $ \theta $ . From the same point and at the same instant, a person starts running with a constant speed $ \frac{{{v}_{0}}}{2} $ to catch the ball. Will the person be able to catch the ball If yes, what should be the angle of projection?

In radioactive decay process, the negatively charged emitted $ \text{-} $ particles are

The maximum number of possible interference maxima for slit separation equal to twice the wavelength in Young's double-slit experiment, is

Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show

The relation between amplification factor $ (\mu ), $ plate resistance $ ({{r}_{p}}) $ and mutual conductance $ ({{g}_{m}}) $ of a triode valve is given by

A ball of mass $m$ elastically collides with a wall with velocity $v$, the $n$ change in its momentum is equal to

An engine pumps up $100\, kg$ of water through a height of $10 \,m$ in $5 \,s$ . Given that, the efficiency of engine is $60\%$ If $ g=10\,ms^{-2}$ the power of this engine is

the power factor of a series L-C-R circuit when at resonance is

The period of oscillation of a simple pendulum of constant length al surface of the earth is $T$. Its time period inside a mine will be

The capacity of an isolated conducting sphere of radius $R$ is proportional to

In an $L-R$ circuit, time constant is that time in which current grows from zero to the value where $ I_{0}$ is steady state current.

If the half-life of any sample of radioactive substance is $4$ days, then the fraction of sample will remain undecayed after $2$ days, will be?

If the critical angle for total internal reflection from medium to vacuum is $ 30{}^\circ $ , the velocity of light in medium is