Physics questions
20027 published questions with worked solutions.
- The electric field in an electromagnetic wave is given by E = (50 NC^ -1 ) sin (t –x/c) The energy contained in a cylinder of...
- A car is moving on a plane inclined at 30º to the horizontal with an acceleration of 10 ms^ -2 parallel to the plane upward. A...
- For extrinsic semiconductors; when doping level is increased;Not in JEE Advanced syllabus
- In a ferromagnetic material, below the curie temperature, a domain is defined as :Not in JEE Advanced syllabus
- A stone is dropped from the top of a building. When it crosses a point 5 m below the top, another stone starts to fall from a...
- Given below are two statements : Statement I : In a diatomic molecule, the rotational energy at a given temperature obeys...
- If a message signal of frequency 'f_m' is amplitude modulated with a carrier signal of frequency 'f_c' and radiated through an...Not in JEE or NEET syllabus
- The wavelength of the photon emitted by a hydrogen atom when an electron makes a transition from n = 2 to n = 1 state is :
- An LCR circuit contains resistance of 110 and a supply of 220 V at 300 rad/s angular frequency. If only capacitance is removed...
- An electron of mass m_e and a proton of mass m_p=1836m_e are moving with the same speed. The ratio of their de Broglie wavelength...
- Y = A sin( + _0) is the time-displacement equation of a SHM. At t = 0 the displacement of the particle is Y= A 2 and it is moving...
- The truth table for the following logic circuit is :Not in JEE Advanced syllabus
- The stopping potential for electrons emitted from a photosensitive surface illuminated by light of wavelength 491 nm is 0.710 V....
- Consider the diffraction pattern obtained from the sunlight incident on a pinhole of diameter 0.1 . If the diameter of the...
- The peak electric field produced by the radiation coming from the 8 W bulb at a distance of 10 m is x 10 _0c V m . The efficiency...
- Two small spheres each of mass 10 mg are suspended from a point by threads 0.5 m long. They are equally charged and repel each...
- The initial velocity v_i required to project a body vertically upward from the surface of the earth to reach a height of 10R,...
- The wavelength of an X-ray beam is 10Å. The mass of a fictitious particle having the same energy as that of the X-ray photons is...
- A reversible heat engine converts one-fourth of the heat input into work. When the temperature of the sink is reduced by 52 K,...
- The percentage increase in the speed of transverse waves produced in a stretched string if the tension is increased by 4%, will...