Practice/Question bank/JEE Main

JEE Main practice questions

NTA-style Physics, Chemistry and Maths MCQs with solutions. 2,688 questions in the bank.

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  1. 1[IMAGE] As shown in the figure, a battery of emf $\varepsilon$ is connected to an inductor L and resistance R in series. The switch is…Physics· Electromagnetic induction· Tough· figure
  2. 2An electron (mass m) with initial velocity $\overset{\rightarrow}{v} = v_{0}\overset{\hat{}}{i} + v_{0}\overset{\hat{}}{j}$ is in an…Physics· Modern physics· Moderate· figure
  3. 3A LCR circuit behaves like a damped harmonic oscillator. Comparing it with a physical spring-mass damped oscillator having damping constant…Physics· AC circuit· Moderate· figure
  4. 4In a fluorescent lamp choke (a small transformer) 100 V of reverse voltage is produced when the choke current changes uniformly from 0.25 A…Physics· Electromagnetic induction· Moderate
  5. 5Both the diodes used in the circuit shown are assumed to be ideal and have negligible resistance whenthese are forward biased. built in…Physics· Semiconductors· Moderate· figure
  6. 6The first member of the Balmer series of hydrogen atom has a wavelength of The wavelength of the second member of the Balmer series (in nm)…Physics· Modern physics· Moderate
  7. 7A point object in air is in front of the curved surface of a plano-convex lens. The radius of curvature of the curved surface is 30 cm and…Physics· Ray Optics· Moderate
  8. 8An electric dipole of moment $\overset{\rightarrow}{p} = ( - \overset{\hat{}}{i} - 3\overset{\hat{}}{j} + 2\overset{\hat{}}{k}) \times…Physics· Electrostatics· Moderate
  9. 9A particle of mass m and charge q is released from rest in a uniform electric field. If there is no other force on the particle, the…Physics· Magnetics· Easy
  10. 10The aperture diameter of a telescope is 5 m. The separation between the moon and the earth is $4 \times 10^{5}$km. With light of wavelength…Physics· Wave Optics· Moderate· figure
  11. 11A capacitor is made of two square plates each of side making a very small angle $\alpha$ between them, as shown in figure. The capacitance…Physics· Capacitor· Tough· figure
  12. 12A charged particle of mass moving under the influence of uniform electric field $E\overset{\rightarrow}{i}$and a uniform magnetic field…Physics· Magnetics· Tough· figure
  13. 13In the given circuit, value of Y isPhysics· Digital electronics· Moderate· figure
  14. 14Consider two charged metallic spheres $S_{1}$ and $S_{2}$ of radii$R_{1}$and $R_{2}$, respectively. The electric fields $E_{1}$(on $S_{1}$)…Physics· Electrostatics· Moderate
  15. 15A uniform rod of length L and mass M is placed on a smooth horizontal surface. The rod is hinged at the end A and is free to rotate in…Physics· Mechanics· Moderate· figure
  16. 16A point object in air is in front of the curved surface of a plano-convex lens. The radius of curvature of thecurved surface is 30 cm and…Physics· Ray Optics· Moderate
  17. 17The activity of a radioactive sample falls from [IMAGE] to [IMAGE] in 30 minutes. Its half life is close toPhysics· Modern physics· Moderate· figure
  18. 18A uniform elastic rod of cross-section area A, natural length L and Young's modulus Y is placed on asmooth horizontal surface. Now two…Physics· Tough· figure
  19. 19A uniform cylinder floats with its axis vertical with [IMAGE] parts of its length in the upper liquid and [IMAGE] part of its length in…Physics· figure
  20. 20A disc of mass is attached to a spring of stiffness During its motion, the disc rolls on the ground. When released from some stretched…Physics· Simple Harmonic Motion· Moderate· figure
  21. 21In a double-slit experiment, at a certain point on the screen the path difference between the two interfering waves is [IMAGE] of a…Physics· Wave Optics· Moderate· figure
  22. 22An object is gradually moving away from the focal point of a concave mirror along the axis of the mirror. The graphical representation of…Physics· Ray Optics· Easy· figure
  23. 23A very long wire ABDMNDC is shown in figure carrying current I. AB and BC parts are straight, longand at right angle. At D wire forms a…Physics· Magnetism· Tough· figure
  24. 24The figure gives experimentally measured B vs. H variation in a ferromagnetic material. The retentivity, coercivity and saturation,…Physics· Magnetism· Moderate· figure
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