List of top Physics Questions asked in KEAM

In synchrotron, the required high magnetic fields are generated by

The transverse nature of electromagnetic waves is confirmed by the phenomenon of

A \(1\) kW bulb radiates light uniformly in all directions. The intensity at a point on the surface of the surrounding sphere of area \(200\,\text{m}^2\) is (in \(\text{W m}^{-2}\))

Gyromagnetic ratio of an electron is the ratio between

For a circular coil carrying current, the thumb in the right hand thumb rule gives the direction of

The power required to push the arm of a rectangular conductor with a constant speed \(v\) in a motor is directly proportional to

The magnitude of the torque experienced by an electric dipole of dipole moment \(P\) placed at an angle of \(30^\circ\) in a uniform electric field \(E\) is

The rms value of a.c with peak value of \(200\) V is

Mobility is the drift velocity per unit

The resistivity of a metallic wire is directly proportional to (T – temperature; \( \tau \) average time of collisions of free electrons; \( n \) – number of free electrons per unit volume; \( A \) – area of cross-section)

If the work done in moving a charge of \( 3\,C \) from A to B is \( 12\,J \), then the potential difference between A and B is

Force between two charges \( +8\,\mu C \) and \( +2\,\mu C \) is \( 16\,N \). If the charges are brought into contact and then separated by the same distance, the force between them is

If \(T\) and \(\rho\) represent the temperature and density of a gas, then the velocity of sound in the gas is directly proportional to

For an ideal gas at temperature \( T \) having the total number of molecules \( N \), the product of the pressure and volume, \( PV \), is equal to \((k_B \text{ is the Boltzmann constant})\)

If the temperature of a gas is changed to \( 9 \) times the initial value, then the rms velocity of the gaseous molecule increases by

If the speed of transverse waves on a stretched wire of linear density \(7\times 10^{-3}\,\text{kg m}^{-1}\) is \(100\,\text{m s}^{-1}\), then the tension in the wire is

For smaller angular displacement, the period of a simple pendulum depends on

If the mean kinetic energy of one mole of helium gas at \( 400\,K \) temperature is \( 5000\,J \), then that for one mole of neon gas at \( 800\,K \) is

If \( K \) is the kinetic energy of a satellite at a height \( h \) from the surface of earth, then its total energy is

The specific heat capacity at constant volume \(C_v\) of a mole of an ideal gas is related to the gas constant \(R\) and the ratio of the specific heats \(\gamma\) as

The force between two identical solid spheres each of radius \( r \) kept in contact is \( F \). If the distance of their centres is made \( 4r \), then the force between them is

The statement, the total pressure of a mixture of ideal gases is the sum of partial pressures, is called as

When a gas is compressed in an insulated vessel

In a perfectly inelastic head on collision

When two rigid bodies with moments of inertia \(I_1\) and \(I_2\) and angular velocities \(\omega_1\) and \(\omega_2\) respectively are coupled in such a way that their rotation axes coincide, the angular velocity of the combination is \(\omega\). Then