Physics questions
20027 published questions with worked solutions.
- A straight rod of length L extends from x = a to x = L + a. The gravitational force it exerts on a point mass 'm' at x = 0, if...
- A 100 V carrier wave is made to vary between 160 V and 40 V by a modulating signal. What is the modulation index?Not in JEE or NEET syllabus
- A passenger train of length 60 m travels at a speed of 80 km/hr. Another freight train of length 120 m travels at a speed of 30...
- Two electric bulbs, rated at (25 W, 220 V) and (100 W, 220 V), are connected in series across a 220 V voltage source. If the 25 W...
- In a double-slit experiment, green light (5303 Å) falls on a double slit having a separation of 19.44 μm and a width of 4.05 μm....
- A simple pendulum of length 1 m is oscillating with an angular frequency 10 rad/s. The support of the pendulum starts oscillating...
- An electric field of 1000 V/m is applied to an electric dipole at angle of 45°. The value of electric dipole moment is 10^ -29...
- Two rods A and B of identical dimensions are at temperature 30°C. If A is heated up to 180°C and B up to T°C, then the new...
- When 100 g of a liquid A at 100°C is added to 50 g of a liquid B at temperature 75°C, the temperature of the mixture becomes...
- A thermometer graduated according to a linear scale reads a value x_0 when in contact with boiling water, and x_0/3 when in...
- In a photoelectric experiment, the wavelength of the light incident on a metal is changed from 300 nm to 400 nm. The decrease in...
- A pendulum is executing simple harmonic motion and its maximum kinetic energy is K_1. If the length of the pendulum is doubled...
- The mass and the diameter of a planet are three times the respective values for the Earth. The period of oscillation of simple...
- A paramagnetic substance in the form of a cube with sides 1 cm has a magnetic dipole moment of 20 10^ -6 J/T when a magnetic...Not in JEE Advanced syllabus
- A metal ball of mass 0.1 kg is heated up to 500°C and dropped into a vessel of heat capacity 800 JK^ -1 and containing 0.5 kg...
- A particle of mass m is moving in a straight line with momentum p. Starting at time t = 0, a force F = kt acts in the same...
- A 27 mW laser beam has a cross-sectional area of 10 mm^2. The magnitude of the maximum electric field in this electromagnetic...
- A monochromatic light is incident at a certain angle on an equilateral triangular prism and suffers minimum deviation. If the...
- In a hydrogen like atom, when an electron jumps from the M-shell to the L-shell, the wavelength of emitted radiation is λ. If an...
- A particle of mass m and charge q is in an electric and magnetic field given by E = 2 i + 3 j; B = 4 j + 6 k. The charged...