Physics questions
20027 published questions with worked solutions.
- A particle moves with simple harmonic motion in a straight line. In first s, after starting from rest it travels a distance a and...
- During the propagation of electromagnetic waves in a medium -
- Three rods of Copper, Brass and Steel are welded together to form a Y-shaped structure. Area of cross-section of each rod = 4...
- Hydrogen ( _1 H ^1), Deuterium ( _1 H ^2), singly ionised Helium ( _2 He ^4)^+ and doubly ionised lithium ( _3 Li ^6)^ ++ all...
- When a rubber-band is stretched by a distance x, it exerts a restoring force of magnitude F = ax + bx^2 where a and b are...
- A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1m 1000 times. Assume that the potential...
- A satellite is revolving in a circular orbit at a height 'h' from the earth's surface (radius of earth R; h << R). The minimum...
- A pendulum clock loses 12 s a day if the temperature is 40°C and gains 4s a day if the temperature is 20°C. The temperature at...
- An ideal gas undergoes a quasi static, reversible process in which its molar heat capacity C remains constant. If during this...
- A particle performs simple harmonic motion with amplitude A. Its speed is trebled at the instant that it is at a distance 2A 3...
- A uniform string of length 20m is suspended from a rigid support. A short wave pulse is introduced at its lowest end. It starts...
- The temperature dependence of resistances of Cu and undoped Si in the temperature range 300-400 K, is best described byNot in JEE Advanced syllabus
- Two identical wires A and B, each of length 'ℓ', carry the same current I. Wire A is bent into a circle of radius R and wire B is...
- An arc lamp requires a direct current of 10 A at 80 V to function. If it is connected to a 220 V (rms), 50 Hz AC supply, the...
- Arrange the following electromagnetic radiations per quantum in the order of increasing energy : A : Blue light B : Yellow light...
- An observer looks at a distant tree of height 10 m with a telescope of magnifying power of 20. To the observer the tree appears :
- The box of a pin hole camera, of length L, has a hole of radius a. It is assumed that when the hole is illuminated by a parallel...
- Radiation of wavelength λ, is incident on a photocell. The fastest emitted electron has speed v. If the wavelength is changed to...
- A screw gauge with a pitch of 0.5 mm and a circular scale with 50 divisions is used to measure the thickness of a thin sheet of...
- A pipe open at both ends has a fundamental frequency f in air. The pipe is dipped vertically in water so that half of it is in...