List of top Physics Questions asked in KEAM

The lowest frequency of the air column in an open pipe of length $ L $ is $ v $ (velocity of sound in air)

Speed of a transverse wave on a stretched string under tension $T$ and linear density $\mu$ is

A particle executes a linear SHM with an amplitude $a$ and angular velocity $\omega$. The ratio between its acceleration amplitude and displacement amplitude is

When the number of molecules per unit volume of an ideal gas is $ 0.8 \times 10^{24} $, the mean free path length for its molecules is $ 2.2 \times 10^{-5} \, {m} $. If the number of molecules per unit volume is $ 1.0 \times 10^{24} $, then the mean free path is

The work done by a gas on the system is zero in

If $ m_a $ and $ m_i $ are the slopes of the adiabatic and isothermal curves for an ideal gas, then \[ \left( \frac{c_p}{c_v} = \gamma \right) \]

The zeroth law of thermodynamics leads to the concept of

The elastic energy stored per unit volume in a stretched wire is: \[ \left( Y = \text{Young's modulus of the material of the wire}; \quad S = \text{stress acting on the wire} \right) \]

If the radii of two soap bubbles are respectively 2 cm and 3 cm, then the ratio of the excess pressures inside the soap bubbles is

A ball is projected in still air. With respect to the ball the streamlines appear as shown in the figure. If speed of air passing through the region 1 and 2 are $ v_1 $ and $ v_2 $, respectively and the respective pressures, $ P_1 $ and $ P_2 $, respectively, then

A particle of 100 g mass is projected vertically up with a kinetic energy of 20 J. The maximum height reached by the particle is ($ g = 10 $ m/s$ ^2 $) (neglecting air resistance).

For a smoothly running analog clock, the ratio of the angular velocity of the minute hand to the angular velocity of the hour hand is

The principle involved in the performance of a circus acrobat is the conservation of

A block of mass 3 kg executes simple harmonic motion under the restoring force of a spring. The amplitude and the time period of the motion are 0.1 m and 3.14 s respectively. The maximum force exerted by the spring on the block is

A constant force of 6 N acting on a stationary body displaces it by 3 m in 2 s. The average power delivered is

The ratio of the maximum kinetic energy to the maximum potential energy of a bob of a simple pendulum executing small oscillations is

A person standing in an elevator experiences weight loss when the elevator

The coefficient of friction between the road and the tyres of a cyclist is 0.1. The maximum speed with which he can take a circular turn of radius 2 m without skidding is ( $ g = 10 $ m/s$ ^2 $ )

A body of weight $ W $ is suspended from the ceiling of a room through a chain of weight $ w $. The ceiling pulls the chain by a force.

The velocity ($ v $)-time ($ t $) graph for the motion of a body is a straight line making an angle $ 60^\circ $ with the time axis. Then the body is moving with an acceleration (in m$ s^{-2} $) of:

If $\vec{a} = 0.4\hat{i} + 0.3\hat{j} + b\hat{k}$ is a unit vector, then the value of b is

A person travels in a car from p to q with uniform speed u and returns to p with uniform speed v. The average speed for his round trip is

The length of the side of a cube is $ 1.1 \times 10^{-2} $ m. Its volume in $ m^3 $ up to correct significant figures is:

Choose the INCORRECT dimensions:

A particular color of light has a wavelength of 663 nm. What is the energy possessed by the light?
(Planck’s constant $h = 6.63 \times 10^{-34}$ J·s; Velocity of light $c = 3 \times 10^8$ m/s)