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Steelyards Either Roman or Danish steelyards can be improvised using short lengths of lead or iron water pipe as counter-weights and loops of wire s pivots. The rod can be o
(i) It having of dissimilar bright lines. (ii) It is given by an excited source in atomic state. (iii)E.g. Spectrum of excited helium, mercury vapours sodium vapours or atomi
An electron and a proton are moving at the similar speed in circular paths in the similar uniform magnetic field. The radius of the path of the proton is one of the following.
what is dynamics
An x-ray photon collides with a free electron, and the photon is scattered. During this collision there is conservation of: a) Momentum but not energy b) Neither momentu
differentiate between direct and indirect band gaps
a) Spin motion of electrons b) On the basis of spin and orbital motion of electrons c) These are feebly attracted in an external magnetic field i.e., have a tendency to go fr
Suppose the sides of a closed polygam represent vector arrangend head to tail rule , what is sum of these vectors ?
explain the construction and working of compound microscope
To free a charged a particle freely in air under the persuade of electric field its downward weight should be balanced by upward electric force for instance if a positive charge is
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