JEE Main questions
34495 published questions with worked solutions.
- An external pressure P is applied on a cube at 0°C so that it is equally compressed from all sides. K is the bulk modulus of the...
- C_p and C_v are specific heats at constant pressure and constant volume respectively. It is observed that C_p - C_v = a for...
- An observer is moving with half the speed of light towards a stationary microwave source emitting waves at frequency 10 GHz. What...
- An electric dipole has fixed dipole moment p , which makes angle θ with respect to x-axis. When subjected to an electric field E...
- A capacitance of 2 μF is required in an electrical circuit across a potential difference of 1.0 kV. A large number of 1μF...
- A magnetic needle of magnetic moment 6.7 10^ -2 Am^2 and moment of inertia 7.5 10^ -6 kg m^2 is performing simple harmonic...
- When a current of 5 mA is passed through a galvanometer having a coil of resistance 15Ω, it shows full scale deflection. The...
- A diverging lens with magnitude of focal length 25 cm is placed at a distance of 15 cm from a converging lens of magnitude of...
- In a Young's double slit experiment, slits are separated by 0.5 mm, and the screen is placed 150 cm away. A beam of light...
- A particle A of mass m and initial velocity v collides with a particle B of mass m 2 which is at rest. The collision is head on,...
- A radioactive nucleus A with a half life T, decays into a nucleus B. At t = 0, there is no nucleus B. At sometime t, the ratio of...
- In amplitude modulation, sinusoidal carrier frequency used is denoted by _c and the signal frequency is denoted by _m. The...Not in JEE or NEET syllabus
- The following observations were taken for determining surface tension T of water by capillary method : diameter of capillary, D =...
- Given C_ (graphite) + O_2(g) CO_2(g) ; _rH^ = -393.5 kJ mol^ -1 H_2(g) + 1 2 O_2(g) H_2O(l) ; _rH^ = -285.8 kJ mol^ -1 CO_2(g) +...
- 1 gram of a carbonate ( M_2CO_3 ) on treatment with excess HCl produces 0.01186 mole of CO_2 . The molar mass of M_2CO_3 in g...
- The Tyndall effect is observed only when following conditions are satisfied - (a) The diameter of the dispersed particles is much...Not in JEE Main or NEET syllabus
- A metal crystallises in the face centred cubic structure. If the edge length of its unit cell is 'a', the closest approach...Not in JEE Main or NEET syllabus
- Given E^ _ Cl_2/Cl^- = 1.36 V, E^ _ Cr^ 3+ /Cr = -0.74 V E^ _ Cr_2O_7^ 2- /Cr^ 3+ = 1.33 V, E^ _ MnO_4^-/Mn^ 2+ = 1.51 V, Among...
- The freezing point of benzene decreases by 0.45°C when 0.2 g of acetic acid is added to 20 g of benzene. If acetic acid...
- The radius of the second Bohr orbit for hydrogen atom is – (Planck's Const. h = 6.6262 10^ -34 Js; mass of electron = 9.1091 10^...