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In the figure below the closed surfaces A and B appear as closed curves. Find the flux through closed surface B.
Q. What is the focal length of a convex lens of focal length 30 cm in contact with a Concave lens of focal length 20 cm ? Is the system a converging or a diverging lens? Ignore
A commuter train blows its horn as it passes a passenger platform at a constant speed of 40.0m/s. The train horn sounds at a frequency of 305 Hz when the train is at rest. (a) W
(a) A cast steel ring has a cross-sectional area of 600mm 2 and a radius of 25mm. Verify the mmf essential to establish a flux of 0.8mWb in the ring. Use the B-H curve for cast st
RESISTANCE: An electric current is a flow of free electrons through a conductor. The size of current flowing through a conductor for a given applied voltage depends on: • T
Which of the following particles has more electrons than neutrons: (1) C (2) F- (3)O -2 (4)Al +3 Ans: O -2
Archimedes' principle A body which is submerged into a fluid is buoyed up through a force equal in magnitude to the weight of the fluid which is displaced, and directed upward
Q. What are polar molecules? Give an example. i) A polar molecule is one in that the centre of gravity of the positive charges is separated from the centre of gravity of the ne
What do you mean by photo electric effect? Show the laws of photoelectric effect. Illustrate these laws using Einstein's equation of photo electric effect?
A man exerts a force of 310 N on a lever to raise a crate with a mass of 910 kg. If the efficiency of the lever is 78 percent, what is the lever's IMA?
Postulates of Special Theory of Relativity - 1. All law of physics having same form in all inertial frame of reference. 2. The speed of light in free space is constant, irres
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