Books by Author Lovekush Kumar
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Recent Articles
N moles of a polyatomic gas (f = 6) must be mixed with two moles of a monoatomic gas so that the mixture behaves as a diatomic gas. The value of N is : JEE 2024
Finally diatomic so take F=5 as degree of freedom for diatomic is 5 .
A particle is moving in a straight line. The variation of position ‘x’ as a function of time ‘t’ is given as x = (t^3 – 6t^2 + 20t + 15) m. The velocity of the body when its acceleration becomes zero is :
To find velocity v, we first need the relation between v and t .
to know time for a=0 we need relation between a and t .
A plane electromagnetic wave of frequency 35 MHz travels in free space along the X-direction. At a particular point (in space and time) E = 9.6 jˆ V /m. The value of magnetic field at this point is : JEE 2024
A planet takes 200 days to complete one revolution around the Sun. If the distance of the planet from Sun is reduced to one fourth of the original distance, how many days will it take to complete one revolution ?
A wire of length L and radius r is clamped at one end. If its other end is pulled by a force F, its length increases by l. If the radius of the wire and the applied force both are reduced to half of their original values keeping original length constant, the increase in length will become ? JEE 2024
Two metallic wires P and Q have same volume and are made up of same material. If their area of cross sections are in the ratio 4 : 1 and force F1 is applied to P, an extension of delta l is produced. The force which is required to produce same extension in Q is F2. Find the ratio of F1 and F2. JEE 2024
K is corresponding spring constant for a wire for easing the calculation using F=-kx
Y is young's modulus of elasticity.
A small liquid drop of radius R is divided into 27 identical drops. If the surface tension is T, then the work done in the process will be : JEE 2024
In Young’s double slit experiment, light from two identical sources are superimposing on a screen. The path difference between the two lights reaching at a point on the screen is 7 lambda / 4 . The ratio of intensity of fringe at this point with respect to the maximum intensity of the fringe is ? JEE 2024
In a single slit diffraction pattern, a light of wavelength 6000 Å is used. The distance between the first and third minima in the diffraction pattern is found to be 3 mm when the screen in placed 50cm away from slits. The width of the slit is ______ × 10–4 m.? JEE 2024
Two particles X and Y having equal charges are being accelerated through the same potential difference. Thereafter they enter normally in a region of uniform magnetic field and describes circular paths of radii R1 and R2 respectively. The mass ratio for X and Y is : JEE 2024
Simply all conditions have been incorporated in the standard formula.