Books by Author Lovekush Kumar
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Recent Articles
Let T1 and T2 be the energy of an electron in the first and second excited states of hydrogen atom, respectively. According to Bohr's model of an atom, the ratio T1 : T2 is? NEET 2022
The angle between the electric lines of force and the equipotential surface is ? NEET 2022
It is 90°
Electric lines of force are along (for positive charge) or opposite (for negative charge) to the electric field lines.
In a Young's double slit experiment, a student observes 8 fringes in a certain segment of screen when a monochromatic light of 600 nm wavelength is used. If the wavelength of light is changed to 400 nm, then the number of fringes he would observe in the same region of the screen is? NEET 2022
Narrow fringes will be more in number, inverse relation with fringe width.
The ratio of the radius of gyration of a thin uniform disc about an axis passing through its centre and normal to its plane to the radius of gyration of the disc about its diameter is ? NEET 2022
Write expressions and divide.
If the initial tension on a stretched string is doubled, then the ratio of the initial and final speeds of a transverse wave along the string is? NEET 2022
A copper wire of length 10 m and radius .01 / square root pi meter has an electrical resistance of 10 ohm. The current density in the wire for an electric field strength of 10 (V/m) is:
Multi Formula question.
A light ray falls on a glass surface of refractive index square root 3, at an angle of 60°. The angle between the refracted and reflected rays would be
It is a question of Brewster's law.
An electric lift with a maximum load of 2000 kg (lift+ passengers) is moving up with a constant speed of 1.5 ms^ -1 . The frictional force opposing the motion is 3000 N. The minimum power delivered by the motor to the lift in watts is: (g=10ms^ -2 )
A square loop of side 1 m and resistance 1 ohm is placed in a magnetic field of 0.5 T. If the plane of the loop is perpendicular to the direction of the magnetic field, the magnetic flux through the loop is ? NEET 2022
A biconvex lens has radii of curvature, 20 cm each. If the refractive index of the material of the lens is 1.5, the power of the lens is ? NEET 2022
Lens maker fomula for focal length then change f in meter for calculating power.
