List of top Physics Questions asked in KEAM

The maximum and minimum distances of a planet from sun are $r_1$ and $r_2$ respectively. If minimum velocity is $V_1$ and minimum velocity is $V_2$, then the ration $V_1 : V_2$ is:

A block of mass 2kg slides on a rough horizontal surface ($\mu_k = 0.2$) with initial speed 10m/ s. Find the stopping distance

Area under velocity- time graph of a particle is equal to

In ac circuit containing an ac source of frequency f, the capacitance is proportional to

A solenoid has 1000 turns per meter and carries a current of \( \frac{7}{\pi} \) A. The magnetic field inside the solenoid is

If kinetic energy of one mole of monatomic gas is 24.4J, then temperature is(R = 8.314)

The direction of electric field at a point just outside a positively charged spherical conductor is

In Bohr's theory of hydrogen atom if speed of an electron in the first orbit is v, then the speed in 3rd orbit is

A circular coil of radius 10cm with 200 turns is placed $\perp$r to uniform magnetic field of 1.4T. IF magnetic field reduced to zero in 0.2s, what is the average induced emf

If T is the time period of satellite in an orbit of radius r, then the time period in an orbit of radius 3r is:

If resistance of a conductor at $20^\circ$C is $10\Omega$, then the resistance at $80^\circ$C is $[\alpha = 4 \times 10^{-3} \ ^\circ\text{c}^{-1}]$

Ripple frequency of a full wave rectifier is

Force acting on a particle varies with time \( t \) as \( F = kt \), where \( k \) is a constant. The velocity of the particle after a time \( t \) is

If rms speed is increased 20% and volume is kept constant, then increase in pressure is

A brass of length 1m is heated throught a temperature rise of $50^\circ$C. Find thermal stress developed in the rod
$(\alpha = 2 \times 10^{-5} \ ^\circ\text{c}^{-1}, Y = 1 \times 10^{11} \text{ N/m}^2)$

Two identical cells having internal resistance $1\Omega$ and emf 6v and 2v are connected in series with external resistance $4\Omega$, find current throught external resistance

Two bodies of same mass having temperature $T_1$ and $T_2$ place kept contact. Specific heat capacity of bodies are s and 1.2s respectively. find equilibrium temperature.

Energy of radiation incident on a perfect absorbing surface per unit are in unit time is 3.6J. The radiation pressure is:

If wavelength of light and separation between slit and screen are fixed. If the slit width is halved, then the angular width become

64 identical spheres each having charge q coalesce to form one big sphere. Find the ratio of the surface charge density of the big sphere to that of small sphere

If temperature is constant and the electric field is doubled then the drift velocity of electrons in a conductor.

An object of mass m is placed in a lift moving upward with acceleration g/2. Find apparant weight.

If two objects of mass $m_1 = 80$g and $m_2 = 120$g moves with same speed 6cm/s, find the velocity of centre of mass

Time period of a particle is \( T = k\sqrt{\frac{\rho r^3}{\sigma}} \), where \( k \) is a dimensionless constant, \( \rho \) is density, and \( r \) is radius. The dimension of \( \sigma \) is same as

Displacement of a particle is given by \( x = t^{3/2} + 2 \). Find the time at which velocity becomes zero.