Physics questions
20027 published questions with worked solutions.
- In a Wheatstone's bridge, there resistances P, Q and R connected in the three arms and the fourth arm is formed by two...
- The resistance of a bulb filament is 100Ω at a temperature of 100^ . If its temperature coefficient of resistance be 0.005 per...
- An electric bulb is rated 220 volt −100 watt. The power consumed by it when operated on 110 volt will be
- Needles N_1, N_2 and N_3 are made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. A magnet when...Not in JEE Advanced syllabus
- A long solenoid has 200 turns per cm and carries a current i. The magnetic field at its centre is 6.28 10^ -2 Weber /m^2. Another...
- In an AC generator, a coil with N turns, all of the same area A and total resistance R, rotates with frequency in a magnetic...
- The flux linked with a coil at any instant ' t ' is given by = 10t^2 - 50t + 250 The induced emf at t = 3 s is
- In a series resonant LCR circuit, the voltage across R is 100 volts and R = 1k with C = 2 F. The resonant frequency is 200rad/s....
- The rms value of the electric field of the light coming from the Sun is 720 N/C. The average total energy density of the...
- The refractive index of glass is 1.520 for red light and 1.525 for blue light. Let D_1 and D_2 be an of minimum deviation for red...
- The time by a photoelectron to come out after the photon strikes is approximately
- The threshold frequency for a metallic surface corresponds to an energy of 6.2eV, and the stopping potential for a radiation...
- An alpha nucleus of energy 12mv^2 bombards a heavy nuclear target of charge Ze. Then the distance of closest approach for the...
- When _3Li' nuclei are bombarded by protons, and the resultant nuclei are _4Be^8, the emitted particles will be
- A solid which is transparent to visible light and whose conductivity increases with temperature is formed byNot in JEE Advanced syllabus
- If the binding energy per nucleon in ^7_3Li and ^4_2He nuclei are 5.60MeV and 7.06MeV respectively, then in the reaction p +...
- If the ratio of the concentration of electrons that of holes in a semiconductor is 75 and the ratio of currents is 74, then what...
- The velocity of a particle is v = v_0 + gt + ft^2. If its position is x = 0 at t = 0, then its displacement after unit time (t =...
- A particle is projected at 60^ to the horizontal with a kinetic energy K. The kinetic energy at the highest point is
- A particle just clears a wall of height b at distance a and strikes the ground at a distance c from the point of projection. The...