Physics questions
20027 published questions with worked solutions.
- An electron is constrained to move along the y-axis with a speed of 0.1 c (c is the speed of light) in the presence of...
- Two capacitors of capacitances C and 2C are charged to potential differences V and 2V, respectively. These are then connected in...
- Two concentric circular coils, C_1 and C_2, are placed in the XY plane. C_1 has 500 turns, and a radius of 1 cm. C_2 has 200...
- A Force F =( i +2 j +3 k )N acts at a point (4 i +3 j - k )m. Then the magnitude of torque about the point ( i +2 j + k )m will...
- A beam of electrons of energy E scatters from a target having atomic spacing of 1Å. The first maximum intensity occurs at = 60°....
- A compound microscope consists of an objective lens of focal length 1cm and an eye piece of focal length 5 cm with a separation...
- A parallel plate capacitor has plate of length ' ', width 'w' and separation of plates is 'd'. It is connected to a battery of...
- An iron rod of volume 10^ -3 m ^3 and relative permeability 1000 is placed as core in a solenoid with 10 turns/cm. If a current...
- The acceleration due to gravity on the earth's surface at the poles is g and angular velocity of the earth about the axis passing...
- A driver in a car, approaching a vertical wall notices that the frequency of his car horn, has changed from 440 Hz to 480 Hz,...
- In an adiabatic process, the density of a diatomic gas becomes 32 times its initial value. The final pressure of the gas is found...
- A radioactive nucleus decays by two different processes. The half life for the first process is 10 s and that for the second is...
- Two different wires having lengths L_1 and L_2, and respective temperature coefficient of linear expansion _1 and _2, are joined...
- The quantities x= 1 _0 _0 , y= E B and z= 1 CR are defined where C-capacitance, R-Resistance, -length, E-Electric field,...
- A spaceship in space sweeps stationary interplanetary dust. As a result, its mass increases at a rate dM dt =bv^2(t), where v(t)...
- The correct match between the entries in column I and column II are : List-I: (a) Microwave (b) Gamma rays (c) A.M. radio waves...
- The surface of a metal is illuminated alternately with photons of energies E_1 = 4eV and E_2 = 2.5 eV respectively. The ratio of...
- Nitrogen gas is at 300°C temperature. The temperature (in K) at which the rms speed of a H_2 molecule would be equal to the rms...
- A body of mass 2 kg is driven by an engine delivering a constant power 1 J/s. The body starts from rest and moves in a straight...
- A prism of angle A = 1° has a refractive index = 1.5. A good estimate for the minimum angle of deviation (in degrees) is close to...