List of top Physics Questions

Figure represents the position-time graph of a body of mass $ 4 \,kg $ . Impulse $ (kg\, ms^{-1}) $ imparted to the body at $ t = 0 $ is
A man throws a ball of mass $ 3.0\, kg $ with a speed of $ 5.0 \,m/s $ . His hand is in contact with the ball for $ 0.2 \,s $ . If he throws $ 4 $ balls in $ 2 $ seconds, the average force exerted by him in $ 1 $ second is
A particle of mass $ m $ is moving with a constant velocity along a line parallel to the positive direction of $ X $ -axis. The magnitude of its angular momentum with respect to the origin
A bicyclist comes to a skidding stop in $10\, m$. During this process, the force on the bicycle due to the road is $200\, N$ and is directly opposed to the motion. The work done by the cycle on the road is
Due to atmospheric refraction effects, the day becomes longer by
A ball is thrown horizontally from a height of $ 100\, m $ with an initial speed of $ 15\,m \,s^{-1} $ . How far does it travel horizontally in the first $ 2 $ seconds ?
Which wave, or ray is produced due to decelerating or accelerating charged particles ?
What proves that light is a transverse wave?
The primary of a transformer has 400 turns while the secondary has 2000 turns. If the power output from the secondary at 1000 V is 12 kW, what is the primary voltage?
If the X-ray tube is working at 20 kV then the minimum wavelength of X-rays will be
Find error in calculation of resistivity of R = 65 ? 1 O l = 5 ? 0.1 mm d = 10 ? 0.5 mm
Two concentric circular coil of radius 20 cm and 30 cm carries current of 2A and 3A respectively in opposite direction then magnetic field at centre will be :-
Due to ? decay, what is the effect on neutron and proton numbers?
Find pressure on swimmer at a depth of 10 m in water.
A particle is thrown vertically up with speed 6 m/s. Find maximum height achieved.
The magnitude of point charge due to which the electric field 30 cm away has the magnitude ,$2 \, NC^{-1}$ will be
An object is placed at a distance of 20 cm from the pole of a concave mirror of focal length 10 cm. The distance of the image formed is
A step-up transformer operates on a 230 V line and a load current of 2 A. The ratio of primary and secondary windings is 1 : 25. Then the current in the primary is
A man weighing 60 kg is in a lift moving down with an acceleration of $1.8 \, ms^{-2}$. The force exerted by the floor on him is
A jet plane having a wing-span of 25 m is travelling horizontally towards east with a speed of 3600 km/hour. If the Earth?s magnetic field at the location is $4 \times 10^{-4} \, T$ and the angle of dip is $30^{\circ}$, then, the potential difference between the ends of the wing is
A cyclotron?s oscillator frequency is 10 MHz and the operating magnetic field is 0.66 T. If the radius of its dees is 60 cm, then the kinetic energy of the proton beam produced by the accelerator is
A space station is at a height equal to the radius of the Earth. If $'v_E'$ is the escape velocity on the surface of the Earth, the same on the space station is ....... times $v_E$.
The radius of the Earth is 6400 km. If the height of an antenna is 500 m, then its range is
In the circuit shown in the figure, the input voltage $V_i$ is $20 \, V , V_{BE} = 0 $ and $V_{CE} = 0$ .The values of $I_B , I_C$ and $\beta$ are given by
In a $p-n$ junction diode, change in temperature due to heating