List of top Physics Questions

$\vec{P} = x\hat{i} + 0.8\hat{j} + 0.6\hat{k}$ If magnitude of $\vec{P}$ is 2, value of x is
The capacitance of a capacitor is C when there is air (or vacuum) between its plates. When a dielectric is completely inserted between the plates, the capacitance becomes 2C. Find the dielectric constant of the material.
A spring of spring constant 'k' cut into n pieces. What is the spring constant of each piece?
Two syringes have piston in the ratio 1 : 5. If the pressure exerted in both syringes is same, find the ratio of the forces applied on the piston.
The displacement of a body at any time t is given by \[ x = -\frac{3}{4}t^2 + 12t + 3 \] The velocity of the body is zero after:
Energy of electron of hydrogen atom in $3^{\text{rd}}$ excited state is
Which of the following is diamagnetic
A cyclotron has frequency f and energy E. If the energy is doubled, frequency becomes
If external force acting on a body is zero, centre of mass of body
In a forward biased semiconductor potential changes from 0.9V to 0.6 V. Find current if resistance is $1\Omega$
A constant current of 3A flows through a conductor having potential difference of 200V. Find heat developed in conductor in 25s.
Potential difference between two points in a region having uniform electric field of $800\text{ N/C}$ is $16\text{V}$. Find the distance between two points.
What is the specific heat capacity at constant volume for non-rigid diatomic gas.
In a Young's double slit experiment with a light having wavelength 500 nm, separation between slit is 0.2 mm, distance between slit and screen is 2m. Find fringe width.
An effective power of a combination of 5 identical convex lens having focal length f= 20 cm is
The work function for a metal having threshold frequency $5\times 10^7\text{ Hz}$ is?
A body of mass 'm' is acted upon by two perpendicular forces 4N and 3N. Find mass 'm' if acceleration of a body is $2\text{ m/s}^2$
A ball falls from a height of 20 m, and then bounces back up to 17 m height. The loss of energy is
If orbital radius of geostationary satellite decreases, gravitational potential energy
If fundamental frequency of an open pipe is 200 Hz, then find the fundamental frequency if one end is closed.
Which of the following is incorrect
The resistors $R_1 = 3\Omega$ and $R_2 = 1\Omega$ are connected in parallel to a 20 V battery. Find the heat developed in the resistor $R_1$ in one minute.
When a magnetic field is applied on a stationary electron, it
When the displacement of a particle executing simple harmonic motion is half its amplitude, the ratio of its kinetic energy to potential energy is:
The pressure on an object of bulk modulus $B$ undergoing hydraulic compression due to a stress exerted by surrounding fluid having volume strain $\frac{\Delta V}{V}$ is: