JEE Main questions
34495 published questions with worked solutions.
- A hollow spherical shell at outer radius R floats just submerged under the water surface. The inner radius of the shell is r. If...
- An electrical power line, having a total resistance of 2 , delivers 1 kW at 220 V. The efficiency of the transmission line is...
- Assume that the displacement(s) of air is proportional to the pressure difference ( p) created by a sound wave. Displacement(s)...
- A bullet of mass 5g, travelling with a speed of 210 m/s, strikes a fixed wooden target. One half of its kinetic energy is...
- Number of molecules in a volume of 4 cm ^3 of a perfect monoatomic gas at some temperature T and at a pressure of 2 cm of mercury...
- A square loop of side 2a, and carrying current I, is kept in XZ plane with its centre at origin. A long wire carrying the same...
- A physical quantity z depends on four observables a, b, c and d, as z= a^2b^ 2/3 c d^3 . The percentage of error in the...
- A galvanometer of resistance G is converted into a voltmeter of range 0 – 1V by connecting a resistance R_1 in series with it....
- A wheel is rotaing freely with an angular speed on a shaft. The moment of inertia of the wheel is I and the moment of inertia of...
- The value of the acceleration due to gravity is g_1 at a height h= R 2 (R = radius of the earth) from the surface of the earth....
- An electron is constrained to move along the y-axis with a speed of 0.1 c (c is the speed of light) in the presence of...
- Two capacitors of capacitances C and 2C are charged to potential differences V and 2V, respectively. These are then connected in...
- Two concentric circular coils, C_1 and C_2, are placed in the XY plane. C_1 has 500 turns, and a radius of 1 cm. C_2 has 200...
- A Force F =( i +2 j +3 k )N acts at a point (4 i +3 j - k )m. Then the magnitude of torque about the point ( i +2 j + k )m will...
- A beam of electrons of energy E scatters from a target having atomic spacing of 1Å. The first maximum intensity occurs at = 60°....
- A compound microscope consists of an objective lens of focal length 1cm and an eye piece of focal length 5 cm with a separation...
- The equation that represents the water-gas shift reaction is :Not in JEE Main or NEET syllabus
- Consider the following reaction N_2O_4(g) 2NO_2(g) ; H^0 = +58 kJ For each of the following cases (a, b), the direction in which...
- Which of the following is not an essential amino acid :
- The structure of PCl_5 in the solid state is