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What is the stimulated emission? Define this term briefly. Stimulated emission: a. While photon interacts along with atom that is in the excited state E 2 , in that case de-
Olbers' paradox (H. Olbers; 1826): If the Universe is uniform, infinite & unchanging then the whole sky at night would be bright regarding as bright as the Sun. The further yo
Q. During lightning, it is safer to sit inside car than in an open ground. Why? The metal body of the car offers electrostatic shielding where the electric field is zero. Thro
Explain the terms (i) magnetic declination and (ii) angle of dip at a given place.
define
What occures to Internal Energy of a system ,if work is done (a) on the system, (b) by the system.
These capacitors are made using vitreous enamel on mixture of silica, alkali oxides and fluorides as dielectrics. These capacitors are formed by spraying vitreous lacquer on metal
a) Explain the magnetic effects of current? b) Do the diagram to show the direction of motion of the conductor:
An electric bulb is rated 220 V and 100 W.When it is operated on 110 V, the power consumed will be. Ans) P=V*I I will be same in both cases so P1=V1*I P2=V2*I Dividing both equati
Explain the Resonance of Sound in Strings Strings on musical instruments, like harps, are held still at both ends, that is why the standing waves have nodes at every end of the
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