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Q. What percentage of a given radioactive substance will be left after 5 half -life periods? The residual part of radioactive substance = ( ½ ) 5 Therefore the percentage
BCS theory (J. Bardeen, L.N. Cooper, J.R. Schrieffer; 1957) A theory put forth to describe superconductivity and superfluidity both. This recommend that in the superconducting
When the electron is known energy from external source, it goes to higher energy level. This process is called as excitation. The minimum energy needed to excite an atom is know
Friction of rough surfaces Place two pieces of sandpaper together. Notice the friction that is formed when one is rubbed against the other. Now put some grease among the pieces
A battery of emf 2v and internal resistance 0.1 ohm is being charged with a current of 5A. In what direction will the current will flow inside the battery? Ans) In charging cond
OHM’S LAW: So far you have been introduced to the concepts of electric current (as a movement of free electrons through a conducting material), voltage (or potential) and poten
Define Wave Length Wave Length : The distance travel by a wave during the interval in which the particle of the medium done on vibration is called wavelength
It has large energy gap 3.0ev and is regarded as high temperature semiconductor. It is extremely refectory subliming in the region of 2800 0 C. Because of large band gap it is hope
Fresnel''s diffraction due to a straight edge?
Will a DC motor actually produce voltage if it is spun in reverse? It'll make voltage if you spin it forwards, too. The only difference among a DC motor and a DC generator is w
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