Physics questions
20027 published questions with worked solutions.
- Two radioactive materials A and B have decay constants 25 and 16 respectively. If initially they have the same number of nuclei,...
- A capacitor of capacitance 500 F is charged completely using a dc supply of 100 V. It is now connected to an inductor of...
- Given below are two statements : One is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (A) : Time...
- A ball is thrown up vertically with a certain velocity so that, it reaches a maximum height h. Find the ratio of the times in...
- A ball is projected with kinetic energy E, at an angle of 60° to the horizontal. The kinetic energy of this ball at the highest...
- Two bodies of mass 1 kg and 3 kg have position vectors i + 2 j + k and -3 i - 2 j + k respectively. The magnitude of position...
- Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) :...
- If the length of a wire is made double and radius is halved of its respective values. Then, the Young's modules of the material...
- The time period of oscillation of a simple pendulum of length L suspended from the roof of a vehicle, which moves without...
- Given below are two statements. Statement I : Electric potential is constant within and at the surface of each conductor....
- Two metallic wires of identical dimensions are connected is series. If _ 1 and _ 2 are the conductivities of the these wires...
- An alternating emf E = 440 sin 100 t is applied to a circuit containing an inductance of ( 2 / ) H. If an a.c. ammeter is...
- The kinetic energy of emitted electron is E when the light incident on the metal has wavelength . To double the kinetic energy,...
- Find the modulation index of an AM wave having 8 V variation where maximum amplitude of the AM wave is 9 V.Not in JEE or NEET syllabus
- A travelling microscope has 20 divisions per cm on the main scale while its Vernier scale has total 50 divisions and 25 Vernier...
- An object is projected in the air with initial velocity u at an angle . The projectile motion is such that the horizontal range...
- If the acceleration due to gravity experienced by a point mass at a height h above the surface of earth is same as that of the...
- The pressure P_ 1 and density d_ 1 of diatomic gas ( = 7/5) changes suddenly to P_ 2 (> P_ 1 ) and d_ 2 respectively during an...
- One mole of a monoatomic gas is mixed with three moles of a diatomic gas. The molecular specific heat of mixture at constant...
- A closely wounded circular coil of radius 5 cm. produces a magnetic field of 37.68 10^ -4 T at its center. The current through...