List of top Physics Questions asked in KEAM

Two particles of equal charges after being accelerated through the same potential difference enter a uniform transverse magnetic field and describe circular path of radii $ {{R}_{1}} $ and $ {{R}_{2}} $ respectively. Then the ratio of their masses $ ({{M}_{1}}/{{M}_{2}}) $ is

Three charges $ {{Q}_{0}},-q $ and $ -q $ are placed at the vertices of an isosceles right angle triangle as in the figure. The net electrostatic potential energy is zero if $ {{Q}_{0}} $ is equal to

The refractive indices of glass and water with respect to air are $\frac{3}{2}$ and $\frac{4}{3}$ respectively. Then the refractive index of glass with respect to water is

The resistance of a wire at room temperature $ 30{}^\circ C $ is found to be $ 10\,\Omega $ . Now to increase the resistance by 10%, the temperature of the wire must be [The temperature coefficient of resistance of the material of the wire is $ 0.002/{}^\circ C $ ]

$N$ identical drops of mercury are charged simultaneously to $ 10 \,V $ . When combined to form one large drop, the potential is found to be $ 40\, V $ , the value of $ N $ is

Modulation is the process of superposing

Two balls are dropped to the ground from different heights. One ball is dropped $ 2\, s $ after the other but they both strike the ground at the same time. If the first ball takes $ 5\, s $ to reach the ground, then the difference in initial heights is $ (g=10m{{s}^{-2}}) $

Select the true statement from the following. Nuclear force is

The slope of the kinetic energy versus position vector gives the rate of change of

The skip zone in radio wave transmission is that range where

Which one of the following is not a derived unit ?

A train of $150\, m$ length is going towards north direction at a speed of $10 \,ms ^{-1}$. A parrot flies at a speed of $5 \,ms ^{-1}$ towards south direction . parallel to the railway track. The time taken by the parrot to cross the train is equal to

A piece of ice is floating in a jar containing water. When the ice melts, then the level of water...... :

A wire of length $ L $ and area of cross-section $ A $ is stretched through a distance $ x $ metre by applying a force $ F $ along length, then the work done in this process is: (Y is Youngs modulus of the material)

$ 800\,cc $ volume of a gas having $ \gamma =\frac{5}{3} $ is suddenly compressed adiabatically to $ 100\,cc $ . If the initial pressure is P, then the final pressure will

Which of the accompanying P-V diagrams best represent; an isothermal process?

Physical independence of force is a consequence of

The recoil velocity of a $ 4.0\, kg $ rifle that shoots a $ 0.050\, kg $ bullet at a speed of $ 280\text{ }m{{s}^{-1}} $ is:

If $ \lambda_m $ denotes the wavelength at which the radiative emission from a black body at a temperature $T\, K$ is maximum, then

An object travels north with a velocity of $ 10\text{ }m{{s}^{-1}} $ and then speeds up to a velocity of $ 25\text{ }m{{s}^{-1}} $ in 5 s. The acceleration of the object in these 5 s is:

A ball hangs from a string inside a train moving along a horizontal straight track. The string is observed to incline towards the rear of the train making a constant small angle with the vertical. It shows that the train is:

A plate has a length $ 5\pm 0.1\text{ }cm $ and breadth $ 2\pm 0.01\text{ }cm $ . Then the area of the plate is:

A resistor is constructed as hollow cylinder of dimensions $ {{r}_{a}}=0.5\,cm $ and $ {{r}_{b}}=1.0\,cm $ and $ \rho =3.5\times {{10}^{-5}}\Omega m $ . The resistance of the configuration for the length of 5 cm cylinder is ... $ \times {{10}^{-3}}\Omega $ .

An automobile in travelling at 50 km/h, can be stopped at a distance of 40 m by applying brakes. If the same automobile is travelling at 90 km/h, all other conditions remaining same and assuming no skidding, the minimum stopping distance in metres is:

Unit of Stefan's constant is