JEE Main questions
34495 published questions with worked solutions.
- To raise the temperature of a certain mass of gas by 50ºC at a constant pressure, 160 calories of heat is required. When the same...
- The radius R of a nucleus of mass number A can be estimated by the formula R=(1.3 10^ -15 )A^ 1/3 m., It follows that the mass...
- The mass density of a planet of radius R varies with the distance r from its centre as (r)= _0 (1- r^2 R^2 ). Then the...
- Amount of solar energy received on the earth's surface per unit area per unit time is defined a solar constant. Dimension of...
- A block of mass m attached to a massless spring is performing oscillatory motion of amplitude 'A' on a frictionless horizontal...
- 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....