Physics questions
20027 published questions with worked solutions.
- A solid conducting sphere, having a charge Q, is surrounded by an uncharged conducting hollow spherical shell. Let the potential...
- An alternating voltage V(t) = 220 100 t volt is applied to a purely resistive load of 50 Ω. The time taken for the current to...
- A plane electromagnetic wave travels in free space along the x-direction. The electric field component of the wave at a...
- Two particles move at right angle to each other. Their de-Broglie wavelengths are _1 and _2 respectively. The particles suffer...
- In SI units, the dimensions of _0 _0 is:
- In an interference experiment the ratio of amplitudes of coherent waves is a_1 a_2 = 1 3 . The ratio of maximum and minimum...
- A steel wire having a radius of 2.0 mm, carrying a load of 4 kg, is hanging from a ceiling. Given that g = 3.1π ms^ -2 , what...
- Water from a pipe is coming at a rate of 100 liters per minute. If the radius of the pipe is 5 cm, the Reynolds number for the...
- The bob of a simple pendulum has mass 2 g and a charge of 5.0 μC. It is at rest in a uniform horizontal electric field of...
- An upright object is placed at a distance of 40 cm in front of a convergent lens of focal length 20 cm. A convergent mirror of...
- A thermally insulated vessel contains 150 g of water at 0°C. Then the air from the vessel is pumped out adiabatically. A fraction...
- Ship A is sailing towards north-east with velocity v = 30 i + 50 j km/hr where i points east and j, north. Ship B is at a...
- A boy's catapult is made of rubber cord which is 42 cm long, with 6 mm diameter of cross-section and of negligible mass. The boy...
- Voltage rating of a parallel plate capacitor is 500 V. Its dielectric can withstand a maximum electric field of 10^ 6 V/m. The...
- The wavelength of the carrier waves in a modern optical fiber communication network is close to:
- In a line of sight radio communication, a distance of about 50 km is kept between the transmitting and receiving antennas. If the...Not in JEE or NEET syllabus
- Young's moduli of two wires A and B are in the ratio 7 : 4. Wire A is 2 m long and has radius R. Wire B is 1.5 m long and has...
- The electric field in a region is given by E = (Ax + B) i, where E is in NC^ -1 and x is in metres. The value of constants are A...
- A rocket has to be launched from earth in such a way that it never returns. If E is the minimum energy delivered by the rocket...
- In a simple pendulum experiment for determination of acceleration due to gravity (g), time taken for 20 oscillations is measured...