List of top Physics Questions

A body of mass 2 Kg changes its velocity from (3\(\hat{i}\) - 4\(\hat{j}\)) m/s to (6\(\hat{j}\) + 2\(\hat{k}\)) m/s. what is the change in kinetic energy of the body?
The time taken by a body to slide down the smooth inclined plane is 4sec. The time taken by a body to slide 1/4th of the length of the plane is
A block of mass m is lying on an inclined plane. The coefficient of friction is \(\mu\). The force required to move the block up the inclined plane will be
A juggler throws ball into air. He throws one whenever the previous one is at its highest point. How high do the balls rise if he throws n balls each second?
A body starts from rest and travels with uniform acceleration. If the distance covered in first 2 seconds is 'x' and next 2 seconds is 'y', then
If a body released from the top of a tower of height H meter takes T seconds to reach the ground, where is the body at time T/2 seconds from the ground?
If a pebble is thrown vertically upwards from the top of a tower with velocity 5 m/s. It strikes the ground after 3 seconds. With what velocity the pebble strikes the ground? (take g = 10 ms\(^{-2}\))
The area of rectangle with sides as \(\vec{A} = 3\hat{i} + 4\hat{j}\) and \(\vec{B} = \hat{i} + 3\hat{j}\) is
If \(\vec{A} + \vec{B} = \vec{C}\) and \(A^2 + B^2 = C^2\) then the angle between vectors \(\vec{A}\) and \(\vec{B}\) is
Which pair of physical quantities have same dimensional formula
If we choose velocity V, length L and force F as fundamental physical quantities then how would you express power in terms of V, L and F?
A carnot engine having an efficiency of $\frac{1}{10}$ as heat engine, is used as a refrigerator. If the work done on the system is $10 \text{ J}$, the amount of energy absorbed from the reservoir at lower temperature is
A rigid diatomic ideal gas undergoes an adiabatic process at room temperature. The relation between temperature and volume of this process is $TV^x = \text{constant}$. Then $x$ is
The specific heat at constant volume for a monoatomic gas is $0.075\text{ cal/kg}\cdot\text{K}$ and its gram molecular specific heat is $3\text{ cal/mol}\cdot\text{K}$. Then mass of one atom of that gas is
During the free expansion of an ideal gas, which of the following physical quantity remains constant
If the pressure of an ideal gas contained in a closed vessel is increased by $0.5\%$, the increase in temperature is $2^\circ\text{C}$. The initial temperature of the gas is
To have a good sound effect inside a hall
A source of sound producing wavelength of $50 \text{ cm}$ is moving away from stationary observer with $\frac{1}{5}\text{th}$ speed of sound. The wavelength of the sound heard by the observer is
At critical angle, the angle of refraction is
Two photons of energy $2.5 \text{ eV}$ and $3.5 \text{ eV}$ fall on a metal surface of work function $1.5 \text{ eV}$. The ratio of the maximum velocities of the photoelectrons emitted from the metal surface is
A simple pendulum of length $l_1$ has frequency $\frac{1}{4} \text{ Hz}$ and another simple pendulum of length $l_2$ has frequency $\frac{1}{3} \text{ Hz}$. Then time period of pendulum of length $(l_1 - l_2)$ is
A body executing S.H.M. has a maximum velocity of $1 \text{ ms}^{-1}$ and a maximum acceleration of $4 \text{ ms}^{-2}$. Its amplitude in metres is:
Two identical wires have a fundamental frequency of $100 \text{ Hz}$ when kept under the same tension. If the tension of one of the wires is increased by $21\%$, the number of beats produced is
A force applied by an engine on train of mass $2.05 \times 10^6 \text{ Kg}$ changes its velocity from $5 \text{ m/s}$ to $25 \text{ m/s}$ in $5 \text{ minutes}$. The power of the engine is
The kinetic energy at the highest point of the trajectory of a projectile is $200 \text{ J}$. If the mass of the projectile is $1 \text{ Kg}$ and the maximum height reached by it is $20 \text{ m}$, then velocity of the projectile from the ground is