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Two charges eachof q=+2 micro coloumb are placed at the vertices Q and R of the triangle .the sum of sides PQ and PR is 12cm and their product is 32 cm_2 .the potential at point P is?Solution) In ΔPQR, Let PQ=8cm PR=4cmAt P, V=9*109 {(2/4) + (2/8)}*10-6*102 = 9*109*(3/4)*10-4 = 6.75*105
Emission spectrum of hidrogen is different from emission spectrum of sodium.Why? Ans) Because, in sodium atom there are already many other electrons present in the atom aother than
describe the construction and working of geiger muller counter. give its important application.
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
What is quantisation of electric charge?
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Explain the Photoelectric Effect Atomic Models Heinrich Hertz first observed the photoelectric effect in 1887. He noticed that if a photon with enough energy is absorbed by an
When do you use Wn instead of work - A?
The SI unit of pressure is the: a) Torr b) Dyne per centimeter squared c) Atmosphere d) Pascal Ans: The SI unit of pressure is the Pascal.
Physics of radiation therapy The probability of your having cancer during your lifetime is about 1 out of 4 .Currently three major methods are used alone or in combination
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