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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.
1) Examine a particular thin film system in some depth -review the literature. Ag deposited on GaAs Al deposited on Si Fe/Cr/Fe multilayer structures 2) E
Draw a free-body diagram for a goldfish that is motionless in the middle of a fish bowl. Recognize the forces acting on the fish. Show the direction of the net force on the f
Two trains on separate tracks move toward one another. Train 1has a speed of 140 km/h, train 2 speed of 55.0 km/h. Train 2 blows it shorn, emitting a frequency of 500 Hz. What is t
A 6kg crate originally at rest is pulled to the right along a horizontal plane with a constant horizontal force of 12N. a)find the velocity of the crate once it has moved 3m on th
Textile industry: High speed drives are essential with wide range of control, small & medium motors are employed. Commutator motors and synchronous motors are used.
Th e fixed value resistors are those whose resistance are fixed and cannot be changed. The fixed resistors can be further subdivided into following categories. (a)
An object is placed 25.0cm from a thin converging lens. A screen is positioned so that a sharp image of the object is seen on the screen. When the object is moved 4.0cm closer to t
Determine the external reactions on the x- and y-directions needed to hold the fixed vane, which turns the free oil jet in a horizontal plane. V1 = 18 m/s, V2 = 17 m/s, and Q = 0.1
Explain Force Diagrams and Addition of Forces If you have a piano and your friend offers to help move it, would it be more helpful for him to push with 100 Newtons on the
A triode valve which is acting as an amplifier gives a voltage gain of 30. If anode resistance is 20 K ? for valve and load resistance is 60 K ?, what is value of amplification fac
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