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. 1Two identical wires A and B, each of length $\mathcal{l}$, carry the same current I. Wire A is bent into acircle of radius R and wire B is…Physics· Magnetic effect of current· Easy / Moderate/ Tough
  2. 2The loss of energy in KWH in a specimen of Iron is $\frac{n}{25}$. The hysteresis loop of which is equivalent in area equal to 250 Jm^-3…Physics· Magnetism· Moderate
  3. 3A uniform magnetic field B in positive z direction exists in a circular region of radius R = 5 m. A loop of radius R = 5m lying in x - y…Physics· EMI· Tough· figure
  4. 4A plane electromagnetic wave is propagating along the direction$\frac{\overset{\hat{}}{\mathbf{i}} +…Physics· EM wave· Moderate
  5. 5A long, straight wire of radius a carries a current distributed uniformly over its cross-section. The ratioof the magnetic fields due to…Physics· Magnetic effect of current· Moderate· figure
  6. 6The electric fields of two plane electromagnetic plane waves in vacuum are given by: ${\overset{\rightarrow}{E}}_{1} =…Physics· EM wave· Tough
  7. 7A 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· Magnetic effects of current· Tough· figure
  8. 8A plane electromagnetic wave of frequency 25 GHz is propagating in vacuum along the z-direction. At aparticular point in space and time,…Physics· EM wave· Moderate
  9. 9Consider a circular coil of wire carrying constant current I, forming a magnetic dipole. The magnetic flux through an infinite plane that…Physics· Magnetic effect of current· Moderate
  10. 10A uniform magnetic field parallel to the plane of paper, existed in space initially directed from left to right. When a bar of soft iron is…Physics· Magnetism· Moderate· figure
  11. 11There is a small source of light at some depth below the surface of water (refractive index =4/3) in a tank of large cross sectional…Physics· Ray Optics· Moderate· figure
  12. 12The aperture diameter of a telescope is 5 m. The separation between the moon and the earth is [IMAGE]. With light of wavelength of[IMAGE],…Physics· Wave Optics· Moderate· figure
  13. 13An 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
  14. 14The magnifying power of a telescope with tube length 60 cm is5. What is the focal length of its eye piece?Physics· Ray Optics· Moderate· figure
  15. 15Visible light of wavelength [IMAGE] falls normally on single slit and produces a diffractionpattern. It is found that the second…Physics· Wave Optics· Moderate· figure
  16. 16A polarizer - analyzer set is adjusted such that the intensity of light coming out of the analyzer is just 10 of the original intensity.…Physics· Wave Optics· Moderate· figure
  17. 17In a Young's double slit experiment, the separation between the slits is 0.15 mm. In the experiment, asource of light of wavelength 589 mm…Physics· Wave Optics· Easy· figure
  18. 18If we need a magnification of 375 from a compound microscope of tube length 150 mm and an objective of focal length 5 mm, the focal length…Physics· Ray Optics· Tough· figure
  19. 19Final image of point object formed by the combination is locatedPhysics· Ray Optics· Moderate· figure
  20. 20The first diffraction minima due to a single slit diffraction is at [IMAGE] for a light of wavelength[IMAGE]. The width of the slit isPhysics· Wave Optics· Easy· figure
  21. 21In YDSE arrangement, white light is used to illuminate the slits. At point on the screen directly in front of slits, which of these…Physics· Wave Optics· Moderate· figure
  22. 22A parallel beam of light of wavelength [IMAGE] is incident on slit S. Another two slit distance 2 m as shown in the figure. The minimum…Physics· Wave Optics· Moderate· figure
  23. 23The distance between two slits in a Young's double slit experiment is 3 mm. The distance of the screen from the slits is 1 m. Microwaves of…Physics· Wave Optics· Moderate· figure
  24. 24A convex lens forms inverted image of a real object on a fixed screen. The size of image is 12 cm. When lens is displaced 20 cm along…Physics· Ray Optics· Moderate· figure
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