Physics questions
20027 published questions with worked solutions.
- Due to presence of an em-wave whose electric component is given by E = 100 sin( t–kx) NC^ -1 , a cylinder of length 200 cm holds...
- A proton of mass 'm_p' has same energy as that of a photon of wavelength ' '. If the proton is moving at non-relativistic speed,...
- A thin prism P_1 with angle 4° made of glass having refractive index 1.54, is combined with another thin prism P_2 made of glass...
- A tiny metallic rectangular sheet has length and breadth of 5 mm and 2.5mm, respectively. Using a specially designed screw gauge...
- The moment of inertia of a solid disc rotating along its diameter is 2.5 times higher than the moment of inertia of a ring...
- In a measurement, it is asked to find modulus of elasticity per unit torque applied on the system. The measured quantity has...
- Two iron solid discs of negligible thickness have radii R_1 and R_2 and moment of intertia I_1 and I_2, respectively. For R_2 =...
- A uniform magnetic field of 0.4 T acts perpendicular to a circular copper disc 20 cm in radius. The disc is having a uniform...
- A parallel plate capacitor of capacitance 1 μF is charged to a potential difference of 20 V. The distance between plates is 1 μm....
- Match List-I with List-II List-I: (A) Angular Impulse (B) Latent Heat (C) Electrical resistivity (D) Electromotive force List-II:...
- The ratio of vapour densities of two gases at the same temperature is 4 25 , then the ratio of r.m.s. velocities will be :
- The kinetic energy of translation of the molecules in 50g of CO2 gas at 17°C is:
- In a long glass tube, mixture of two liquids A and B with refractive indices 1.3 and 1.4 respectively, forms a convex refractive...
- Which of the following phenomena can not be explained by wave theory of light ?
- Earth has mass 8 times and radius 2 times that of a planet. If the escape velocity from the earth is 11.2 km/s, the escape...
- Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Knowing...
- A concave mirror produces an image of an object such that the distance between the object and image is 20 cm. If the...
- A uniform rod of mass 250 g having length 100 cm is balanced on a sharp edge at 40 cm mark. A mass of 400 g is suspended at 10 cm...
- A 400 g solid cube having an edge of length 10 cm floats in water. How much volume of the cube is outside the water ? (Given :...
- The magnetic field of an E.M. wave is given by B = ( 3 2 i + 1 2 j )30 [ (t- z c ) ] (S.I. Units) The corresponding electric...