JEE Main questions
34495 published questions with worked solutions.
- Magnetic materials used for making permanent magnets (P) and magnets in a transformer (T) have different properties of the...Not in JEE Advanced syllabus
- The least count of the main scale of a vernier callipers is 1 mm. Its vernier scale is divided into 10 divisions and coincide...
- The mass density of a spherical galaxy varies as K r over a large distance 'r' from its centre. In that region, a small star is...
- Interference fringes are observed on a screen by illuminating two thin slits 1 mm apart with a light source ( = 632.8 nm). The...
- A plane electromagnetic wave, has frequency of 2.0 10^ 10 Hz and its energy density is 1.02 10^ -8 J/ m ^3 in vacuum. The...
- In a reactor, 2 kg of _ 92 U ^ 235 fuel is fully used up in 30 days. The energy released per fission is 200 MeV. Given that the...
- A gas mixture consists of 3 moles of oxygen and 5 moles of argon at temperature T. Assuming the gases to be ideal and the oxygen...
- If speed V, area A and force F are chosen as fundamental units, then the dimension of Young's modulus will be :
- An amplitude modulated wave is represented by the expression v_m=5(1+0.6 6280t) (211 10^4t) volts. The minimum and maximum...Not in JEE or NEET syllabus
- Two identical strings X and Z made of same material have tension T_X and T_Z in them. It their fundamental frequencies are 450 Hz...
- A 5 capacitor is charged fully by a 220 V supply. It is then disconnected from the supply and is connected in series to another...
- An engine takes in 5 moles of air at 20°C and 1 atm, and compresses it adiabaticaly to 1/10th of the original volume. Assuming...
- A circular coil of radius 10 cm is placed in a uniform magnetic field of 3.0 10^ -5 T with its plane perpendicular to the field...
- When radiation of wavelength is used to illuminate a metallic surface, the stopping potential is V. When the same surface is...
- For the following Assertion and Reason, the correct option is Assertion (A) : When Cu (II) and sulphide ions are mixed, they...
- If AB_4 molecule is a polar molecule, a possible geometry of AB_4 is :
- In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is
- The statement that is not true about ozone is :
- For octahedral Mn(II) and tetrahedral Ni(II) complexes, consider the following statements : (I) both the complexes can be high...
- Consider that a d⁶ metal ion ( M^ 2+ ) forms a complex with aqua ligands, and the spin only magnetic moment of the complex is...