Books by Author Lovekush Kumar
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Recent Articles
A small telescope has an objective of focal length 140 cm and an eye piece of focal length 5.0 cm. The magnifying power of telescope for viewing a distant object is ? NEET UG2024
A metallic bar of Young’s modulus, 0.5 ×10^11 N m^–2 and coefficient of linear thermal expansion 10^–5 °C^–1, length 1 m and area of cross-section 10^–3 m^2 is heated from 0°C to 100°C without expansion or bending. The compressive force developed in it is
A wire of length ‘l’ and resistance 100 Ω is divided into 10 equal parts. The first 5 parts are connected in series while the next 5 parts are connected in parallel. The two combinations are again connected in series, Find final resistance.
Properties of an electromagnetic wave travelling in free space.
1.They travel with a speed equal to c.
2.they are transverse in nature.
3. They are originated from accelerated charges.
4.The energy density in electric field is equal to energy density in magnetic field.
Acceleration and velocity of a particle moving with uniform speed in a circular path ? NEET UG2024
The acceleration of the particle in unifrom circular motion (constant speed) is constantly changing in direction as it is always directed towards the center. Hence , it is said to be variable.
As direction of velocity too is continuously changing so it is said to be variable velocity.
A thin spherical shell is charged by some source. The potential difference between the two points one is center C and other is at surface P (in V) will be ? NEET UG2024
A thin flat circular disc of radius 4.5 cm is placed gently over the surface of water. If surface tension of water is 0.07 Nm^–1, then the excess force required to take it away from the surface is? NEET UG2024
The moment of inertia of a thin rod about an axis passing through its mid point and perpendicular to the rod, is 2400 g cm^2. The length of the 400 g rod is nearly ?NEET UG2024
A bob is whirled in a horizontal plane by means of a string with an initial speed of ω rpm. The tension in the string is T. If speed becomes 2 ω while keeping the same radius, the tension in the string becomes? NEET UG2024
Calculating the minimum energy required to launch a satellite of mass m from the surface of earth of mass M and radius R in a circular orbit at an altitude of 2R from the surface of the earth. NEET UG2024
