Books by Author Lovekush Kumar
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Recent Articles
The temperature of a gas having 2.0 × 10^25 molecules per cubic meter at 1.38 atm (Given, k = 1.38 × 10^–23 Joule per Kelvin) is: JEE 2024
Volume is not given so assume it to be 1 meter cube then corresponding moles(n) can be calculated using the number density given in question so that we can use ideal gas equation.
In an a.c. circuit, voltage and current are given by : V = 100 sin (100 t) V and I = 100 sin (100 t + pi / 3 ) mA respectively. The average power dissipated in one cycle is : JEE 2024
Two sources of light emit with a power of 200 W. The ratio of number of photons of visible light emitted by each source having wavelengths 300 nm and 500 nm respectively, will be : JEE 2024
A horizontal bridge is built across a river. A student standing on the bridge throws a small ball vertically upwards with a velocity 4 m s^–1. The ball strikes the water surface after 4 s. The height of bridge above water surface is (Take g = 10 m s^–2)
A bullet from a gun is fired on a rectangular wooden block with velocity u. When bullet travels 24 cm through the block along its length horizontally, velocity of bullet becomes u/3 . Then it further penetrates into the block in the same direction before coming to rest exactly at the other end of the block. The total length of the block is ?NEET UG2023
A wire carrying a current I along the positive x-axis has length L. It is kept in a magnetic field B = (2iˆ + 3jˆ – 4kˆ) T. The magnitude of the magnetic force acting on the wire is ?NEET UG2023
Calculate the maximum acceleration of a moving car so that a body lying on the floor of the car remains stationary. The coefficient of static friction between the body and the floor is 0.15 (g = 10 m s^–2). NEET UG2023
10 resistors, each of resistance R are connected in series to a battery of emf E and negligible internal resistance. Then those are connected in parallel to the same battery, the current is increased n times. The value of n is ? NEET UG2023
The resistance of platinum wire at 0°C is 2 ohm and 6.8 ohm at 80°C. The temperature coefficient of resistance of the wire is ? NEET UG2023
The radius of inner most orbit of hydrogen atom is 5.3 × 10^–11 m. What is the radius of third allowed orbit of hydrogen atom? NEET UG2023
