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Radio Waves:
Radio waves are electromagnetic waves with large range of wavelength from a few millimetres to many meters.
The magnetic field B inside a solenoid, having a current of 5 A, is 3.14 X 10 -2 T. Determine the number of turns per unit length of the solenoid.
Draw a ray diagram to show the formation of image of an object placed among the optical centre and focus of the convex lens. Write the characteristics of image formed. Using this d
Quantum Theory of Light: Wave theory failed to describe some new effects in 19th century. A German Physicist Max Plank gave theory about the nature of light. 1. Light is emi
The phenomenon of the formation of the Newton's rings can be explained on the basis of wave theory of light. When a light ray iP1 from an extended monochromatic light source S is a
Methods of Demagnetization: 1. A magnet loss it's magnetic properly when it is heated strongly. 2. Practically a magnet can be demagnetized by hammering when it is placed in
Explain the terms (i) magnetic declination and (ii) angle of dip at a given place.
A 2.00 x 10 3 -g sample of water at 100.0°C is mixed with a 4.00 x 10 3 -g sample of water at 0.0°C in a calorimeter. What is the equilibrium temperature of the mixture?
The points where amplitude is minimized are called as nodes.
Becquerel; Bq (after A.H. Becquerel, 1852-1908) The derived SI unit of activity, described as the activity of a radionuclide decreasing at rate, on the average, of one nuclear
A skydiver falls d1 = 495 meters in t1 = 22 s before opening his parachute. After the chute opens, he falls an additional d2 = 470 meters in t2 = 56.5 s. (a) Write an expression t
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