List of top Physics Questions

The charge present in a doubly ionized helium atom is
Around a stationary charge of +5µC, another charge -5µC is taken once round a circle of radius 4 cm. The amount of work done in Joule is
The force experienced by a proton moving in an electric field of intensity 3E is (e is the charge of the electron)
The ratio of the magnitudes of maximum acceleration to the corresponding velocity of a body undergoing simple harmonic motion, x = a sin 2πft is
The INCORRECT statement is
The time period of a simple pendulum of length L is 3 s. If the length of the pendulum is increased 4 times, the increase in time period of the simple pendulum is
In a gas at STP, if n is the number density of the molecules and r is the radius of the molecule, then the mean free path of the molecule is inversely proportional to
No process is possible whose sole result is the transfer of heat from a colder object to a hotter object. This is Clausius statement for
The r.m.s. speed of molecules of an ideal gas at 27°C is 200 ms-1. When the temperature is increased to 327°C, the r.m.s. speed of the molecules is changed to
A polyatomic molecule has 3 translational, 3 rotational degrees of freedom and 2 vibrational modes. The ratio of specific heats \(\frac{C_P}{C_V}\) is
Three identical silver cups A, B, and C contain three liquids of same densities at same temperature higher than the temperature of the surrounding. If the ratio of their specific heat capacities is 1:2:4, then
The INCORRECT statement is
A process in which the amount of heat supplied to the system goes fully to change its internal energy and temperature is
An ideal Carnot engine working with source temperature T1, and sink temperature T2, has efficiency n. Then the value of the ratio \(\frac{T_1}{T_2}\) is
The working of hydraulic lift is based on the principle of
If the Young's modulus of the material of a wire is numerically equal to ten times the stress applied to a wire of length /, then the change in the length of the wire is
The relative viscosity of blood remains constant between
Gravitational potential energy associated with two point masses, each of 1 kg, separated by a distance of 1cm in Joule is (G= gravitational constant)
Two satellites A and B are orbiting a planet in circular orbits with radii 2R and R respectively. If the speed of satellite A is 2v, then the speed of satellite B is
Weight of a body of mass m in its fall above the surface of the earth is
The minimum speed at which an object of 1 kg mass is thrown from the surface of the moon so that it does not fall back to the moon is
The angular momentum of a particle with respect to the origin will not zero, if
A solid metal cylinder A and a hollow metal cylinder B have same mass but their radii are in the ratio 2: 1. Then the ratio of their respective moments of inertia about their own axis is
Two persons stand at the edges of a rotating circular platform at diametrically opposite points. If they start moving towards each other at uniform velocity, then its
A toy car of mass 80g is maintained to move in a horizontal circle of radius 0.8m with a velocity v ms-1. If the centripetal force acting on it is 10 N, then the value of v in ms-1 is