Physics questions
20027 published questions with worked solutions.
- The parallel combination of two air filled parallel plate capacitors of capacitance C and nC is connected to a battery of...
- The resistance of a galvanometer is 50 ohm and the maximum current which can be passed through it is 0.002 A. What resistance...
- The position vector of a particle changes with time according to the relation r(t) = 15t^2 i + (4 - 20t^2) j. What is the...
- A massless spring (k = 800 N/m) attached with mass (500 g) is completely immersed in 1 kg of water. The spring is stretched by 2...
- Two cars A and B are moving away from each other in opposite directions. Both the cars are moving with a speed of 20 ms^ -1 with...
- Diameter of the objective lens of a telescope is 250 cm. For light of wavelength 600 nm coming from a distant object, the limit...
- The specific heats, C_P and C_V of a gas of diatomic molecules, A, are given (in units of J mol^ -1 K^ -1 ) by 29 and 22,...
- In a conductor, if the number of conduction electrons per unit volume is 8.5 10^ 28 m^ -3 and mean free time is 25 fs (femto...
- Four point charges −q, +q, +q and −q are placed on y-axis at y = −2d, y = −d, y = +d, y = +2d, respectively. The magnitude of the...
- A particle 'P' is formed due to a completely inelastic collision of particles 'x' and 'y' having de-Broglie wavelengths ' _x' and...
- A string 2.0 m long and fixed at its ends is driven by a 240 Hz vibrator. The string vibrates in its third harmonic mode. The...
- A test particle is moving in a circular orbit in the gravitational field produced by a mass density (r) = K r^2 . Identify the...
- A message signal of frequency 100 MHz and peak voltage 100 V is used to execute amplitude modulation on a carrier wave of...Not in JEE or NEET syllabus
- A cylinder with fixed capacity of 67.2 lit contains helium gas at STP. The amount of heat needed to raise the temperature of the...
- A stationary source emits sound waves of frequency 500 Hz. Two observers moving along a line passing through the source detect...
- The electric field of a plane electromagnetic wave is given by E = E_0 i (kz) ( t). The corresponding magnetic field B is then...
- A transformer consisting of 300 turns in the primary and 150 turns in the secondary gives output power of 2.2 kW. If the current...
- In a photoelectric effect experiment the threshold wavelength of light is 380 nm. If the wavelength of incident light is 260 nm,...
- The ratio of surface tensions of mercury and water is given to be 7.5 while the ratio of their densities is 13.6. Their contact...
- A proton, an electron, and a helium nucleus, have the same energy. They are in circular orbits in a plane due to magnetic field...