Physics questions
20027 published questions with worked solutions.
- What is the relative decrease in focal length of a lens for an increase in optical power by 0.1 D from 2.5 D ? ['D' stands for...
- An air bubble of radius 0.1 cm lies at a depth of 20 cm below the free surface of a liquid of density 1000 kg/m³. If the pressure...
- For an experimental expression y = 32.3 1125 27.4 , where all the digits are significant. Then to report the value of y we should...
- During the transition of electron from state A to state C of a Bohr atom, the wavelength of emitted radiation is 2000 Å and it...
- Consider the following statements : A. The junction area of solar cell is made very narrow compared to a photo diode. B. Solar...Not in JEE Advanced syllabus
- The amount of work done to break a big water drop of radius 'R' into 27 small drops of equal radius is 10 J. The work done...
- An object of mass 'm' is projected from origin in a vertical xy plane at an angle 45° with the x-axis with an initial velocity...
- A uniform solid cylinder of mass 'm' and radius 'r' rolls along an inclined rough plane of inclination 45°. If it starts to roll...
- A thin plano convex lens made of glass of refractive index 1.5 is immersed in a liquid of refractive index 1.2. When the plane...
- A particle is executing simple harmonic motion with time period 2s and amplitude 1 cm. If D and d are the total distance and...
- A satellite is launched into a circular orbit of radius 'R' around the earth. A second satellite is launched into an orbit of...
- An alternating current is given by I = I_A t + I_B t. The r.m.s. current will be : -
- An electron of mass 'm' with an initial velocity v = v_0 i (v_0 > 0) enters an electric field E = -E_0 k . If the initial de...
- A parallel plate capacitor was made with two rectangular plates, each with a length of l = 3 cm and breath of b = 1 cm. The...
- A force F = + x^2 acts on an object in the x-direction. The work done by the force is 5J when the object is displaced by 1 m. If...
- An ideal gas goes from an initial state to final state. During the process, the pressure of gas increases linearly with...
- The least count of a screw gauge is 0.01 mm. If the pitch is increased by 75% and number of divisions on the circular scale is...
- A wire of resistance 9 Ω is bent to form an equilateral triangle. Then the equivalent resistance across any two vertices will be...
- The temperature of 1 mole of an ideal monoatomic gas is increased by 50°C at constant pressure. The total heat added and change...
- Young's double slit interference apparatus is immersed in a liquid of refractive index 1.44. It has slit separation of 1.5mm. The...