List of top Physics Questions

In the following P-V diagram of an ideal gas, two adiabates and two isotherms at T₁=300K and T₂=200K are shown. Values are VA=2, VB=8, VC=16. Find VD. 

Seven resistances, each of value 20Ω, are connected to a 2V battery as shown. The ammeter reading will be: 

The variation of magnetic susceptibility χ with temperature T for a diamagnetic substance is best represented by: 

A radioactive substance decays with decay constant 0.5s⁻1 and is being produced at a constant rate of 50 nuclei per second. If there are no nuclei present initially, the time (in s) after which 25 nuclei will be present is:
In an electron gun, the potential difference between the filament and plate is 3000V. What will be the velocity of electron emitting from the gun?
Ten tuning forks are arranged in increasing order of frequency such that any two nearest tuning forks produce 4 beats/s. The highest frequency is twice of the lowest. The possible highest and lowest frequencies (in Hz) are:
A charged particle enters a uniform magnetic field with a certain velocity. The power delivered to the particle by the magnetic field depends on:
A resistor and an inductor are connected to an AC supply of 120V and 50Hz. The current in the circuit is 3A. If the power consumed is 108W, then the resistance in the circuit is:
The wavelengths of two waves are 50cm and 51cm respectively. If the temperature of the room is 20^∘C, then what will be the number of beats produced per second by these waves, when the speed of sound at 0^∘C is 332m/s?
A copper rod of length ℓ rotates about its end with angular velocity ω in a uniform magnetic field B. The emf developed between the ends of the rod if the field is normal to the plane of rotation is:
Electric potential at any point is V = -5x + 3y + √(15)z. The magnitude of the electric field is:
The figure shows the interference pattern obtained in a double slit experiment using light of wavelength 600nm. Fingers marked 1, 2, 3, 4 and 5 are shown. The third order bright fringe is:
A hoop rolls down an inclined plane. The fraction of its total kinetic energy associated with rotational motion is:
Infinite number of masses, each 1kg, are placed along the x-axis at x=±1m, ±2m, ±4m, ±8m, …. The magnitude of the resultant gravitational potential at the origin is:
A body of mass M hits normally a rigid wall with velocity V and bounces back with the same velocity. The impulse experienced by the body is:
A hunter aims his gun directly at a monkey on a tree. At the instant the bullet leaves the barrel, the monkey drops. Pick the correct statement regarding the situation.
A juggler keeps on moving four balls in the air throwing the balls after intervals. When one ball leaves his hand (speed = 20m/s), the position of other balls (height in m) will be (Take g = 10m/s²):
A particle of mass m₁ moving with velocity v collides with a mass m₂ at rest and they get embedded. Just after collision, velocity of the system:
Two oscillators are started simultaneously in same phase. After 50 oscillations of one, they get out of phase by π. The half oscillation. The percentage difference of frequencies of the two oscillators is nearest to:
The ratio of specific heats of a gas is (Cp)/(Cᵥ) = 1.66. The gas may be:
If a stone of mass 0.05kg is thrown out of a window of a train moving at a constant speed of 100km/h, the magnitude of the net force acting on the stone is:
The third line of Balmer series of an ion equivalent to hydrogen atom has wavelength 108.5 nm. The ground state energy of an electron of this ion will be:
A boy running on a horizontal road at 8km/h finds rain falling vertically. He increases his speed to 12km/h and finds the drops make 30^∘ with the vertical. The speed of rain with respect to the road is:
If C is the velocity of light, g the acceleration due to gravity and P the atmospheric pressure, then the dimensions of length will be same as that of:
At a place, if the earth’s horizontal and vertical components of magnetic field are equal, the angle of dip will be: