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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.
why is the sky blue?
Cosmic censorship conjecture (R. Penrose, 1979) The conjecture, so far completely undemonstrated in the context of general relativity, that all singularities (along the possib
Con you describe harmonics? How are stationary waves formed in a closed pipe? Illustrate the various modes of vibrations in a closed pipe and establish the relation between their f
Q. A neutral Ping Pong ball dangles from the ceiling by a thread. A person chafes a rubber rod with animal fur and then touches the Ping Pong ball with the rubber rod. Afterwar
Complementarity principle (N. Bohr) The principle which a given system cannot exhibit wave-like and particle-like both behaviors at the similar time. i.e., certain experiments
What is the difference between diffraction and interference? Diffraction is the bending of waves around an obstacle, whereas interference is the meeting of two waves. For exam
What is the principle of generating ultrasonic waves? The general principle comprised in generating ultrasonic waves is to reasons some dense material to vibrate very quickly.
Standard quantum limit: The restriction imposed on standard methods of measurement through the uncertainty principle inside quantum mechanics.
A ring forming a magnetic circuit is made from two materials; one part is mild steel of mean length 25cm and cross-sectional area 4cm 2 , and the remainder is cast iron of mea
what is light
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