Books by Author Lovekush Kumar
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Recent Articles
A conducting loop of area 2.5 𝑚×2 𝑚 is kept in a magnetic field of 4 Tesla with angle of 60 degree from area vector.. The conducting loop is taken out of the magnetic field in 10 sec. Find the induced emf. JEE 2024
A train is moving on a circular track of radius 400 m with velocity 12 m/s. The distance between the rails is 1.5 m. Find the height by which outer rail should beraised to keep it moving with the same velocity? JEE2024
A particle has initial (𝑡=0) velocity 𝑣 =5𝑖̂ and is at origin at this instant. Its acceleration is given by (3𝑖̂+4𝑗̂). When particle’s 𝑥−𝑐𝑜𝑜𝑟𝑑𝑖𝑛𝑎𝑡𝑒 is 16 units, then its speed is: JEE 2024
A particle performing simple harmonic motion according to 𝑥=𝐴sin𝜔𝑡. Then its kinetic energy (K.E), potential energy (PE) and speed (v) at position 𝑥=𝐴/2 are ? JEE 2024
A sphere of small size is at the bottom of a lake of depth 20 𝑚. Due to pressure, its fractional change in volume is 𝛼×10^−7. What is the value of 𝛼, the bulk modulus of the sphere is 5×10^12 𝑃𝑎 (use 𝑔=10 𝑚/𝑠^2)? JEE 2024
A body of mass 5 kg moving with a uniform speed 3* square root 2 m/s in X – Y plane along the line y = x + 4. The angular momentum of the particle about the origin will be? JEE 2024
A charge of 4 micro coulomb is moving with a velocity of 4.0 × 10^6 ms^–1 along the positive y-axis under a magnetic field B of strength 2kˆ T. The force acting on the charge is x iˆN . The value of x is ? JEE 2024
Hydrogen atom is bombarded with electrons accelerated through a potential different of V, which causes excitation of hydrogen atoms. If the experiment is being performed at T = 0 K. The minimum potential difference needed to observe any Balmer series lines in the emission spectra will be alpha * V /10 , where value of alpha is ? JEE 2024
Required energy is for exciting electron to orbit number 3.
A horizontal straight wire 5 m long extending from east to west falling freely at right angle to horizontal component of earth’s magnetic field 0.60 × 10^–4 Wb per m^2. The instantaneous value of emf induced in the wire when its velocity is 10 meter per second is ? JEE 2024
An electric field is given by (6i + 5j +3k) N/C. The electric flux through a surface area 30ˆi m^2 lying in YZ-plane (in SI unit) is : JEE 2024
