Physics questions
20027 published questions with worked solutions.
- If a semiconductor photodiode can detect a photon with a maximum wavelength of 400 nm, then its band gap energy is : Planck's...Not in JEE Advanced syllabus
- Two resistors 400 and 800 are connected in series across a 6 V battery. The potential difference measured by a voltmeter of 10 k...
- A metallic sphere cools from 50ºC to 40ºC in 300 s. If atmospheric temperature around is 20ºC, then sphere's temperature after...
- A calorimeter of water equivalent 20 g contains 180 g of water at 25ºC. 'm' grams of steam at 100ºC is mixed is 31ºC. The value...
- Two sources of light emit X-rays of wavelength 1 nm and visible light of wavelength 500 nm, respectively. Both the sources emit...
- The electric field of a plane electromagnetic wave propagating, along the x direction is vacuum is E =E_0 j ( t-kx). The magnetic...
- Two light waves having the same wavelength in vacuum are in phase initially, then the first wave travels a path L_1 through a...
- A block of mass 1.9 kg is at rest at the edge of a table, of height 1m. A bullet of mass 0.1 kg collides with the block and...
- A uniform magnetic field B exists in a direction perpendicular to the plane of a square loop made of a metal wire. The wire has a...
- Concentric metallic hollow spheres radii R and 4R hold charges Q_1 and Q_2 respectively. Given that surface charge densities of...
- Which of the following will NOT be observed when a multimeter (operating in resistance measuring mode) probes connected across a...
- If minimum possible work is done by a refrigerator in converting 100 grams of water at 0ºC to ice, how much heat (in calories) is...
- A block starts moving up an inclined plane of inclination 30º with an initial velocity of v_0. It comes back to its initial...
- A galvanometer coil has 500 turns and each turn has an average area of 3 10^ -4 m ^2. If a torque of 1.5 Nm is required to keep...
- When an object is kept at a distance of 30 cm from a concave mirror, the image is formed at a distance of 10 cm from the mirror....
- A light planet is revolving around a massive star in a circular orbit of radius R with a period of revolution T. If the force of...
- Conductivity of a photodiode starts changing only if the wavelength of incident light is less than 660 nm. The band gap of...Not in JEE Advanced syllabus
- A diatomic gas (γ = 1.4) does 200 J of work when it is expanded isobarically. The heat given to the gas in the process is:
- A cricket player catches a ball of mass 120 g moving with 25 m/s speed. If the catching process is completed in 0.1 s, then the...
- A microwave of wavelength 2.0 cm falls normally on a slit of width 4.0 cm. The angular spread of the central maxima of the...