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In a pure semiconductor, concentration of electrons in conduction band is equal to the concentration of holes in valence band. In the process of conduction when an electric field is applied, the electron moves in the opposite direction of the field and occupies the position of nearest hole, so that, a new hole is created in the place of electron.
This process of electron movement and hole movement continues in the semiconductor substance. In the applied electric field, electrons move towards positive terminal of the battery and hole moves towards negative terminal of the battery.
Q. What is superconductivity? The capability of certain metals their compounds and alloys to conduct electricity with zero resistance at very low temperatures are called superc
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A=2i+3j+k B=3i+2j+4k Find:1)A.B=? 2)A+B=?
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COHERENCE : 1) Visible light energy is emitted when the excited electrons in atoms undergo transitions to the ground state. 2) In ordinary light sources, these transitions
what are advantages of identifying the center of gravity
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