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What is the drift velocity of electrons in Si under room temperature and 500 V/m electric field, as we know that the electron mobility of Si is 0.14 m^2 / V.s at room temperature? Under these conditions, how long can an electron pass a Si crystal of 25 mm...

In the company you work as an engineer, you are assigned to determine the electrical conductivity of a new intrinsic semi-conductive material at temperatures of 20 and 100 °C and the band gap (Eg). So you cut out this material in the form of a rectangular...

In the figure below, Intrinsic carrier concentration is given as a function of temperature for Ge and Si. By using the data in this figure calculate the band gap of these materials. For both materials find the energy difference between the Fermi Energy Le...

Show that there exist a sphere with radius r є(0,1) and a cube with side r + 1/2 with the same volume. (Volume of the sphere with radius r is 4/3πr^3, and the volume of a cube with side a is a^3).

Let f(x) = e^x and g(x) = sin(lnx). Find equations for two distinct parallel lines l1 and l2 where; l1 is tangent to f at x = 0 and l2 is tangent to g.

Do you think the operating temperatures of the p-n junction and transistor devices are important in terms of their operability? Explain your opinion clearly for reasons.

Show that the following integral is convergent, Integral, it goes from 0 to infinity dx/(sqrt(x) + x^2)

Find a function g(x) such that all the conditions of the fixed point theorem are satisfied on [0,1]

A bullet of mass 8 gram is fired into a block of mass 2,5 kg initially at rest at the edge of a frictionless table of height 1 m. The bullet remains in the block, and after impact the block lands a distance 2 m from the bottom of the table. Determine the...

In modern injection molding units, why is a reciprocating screw used instead of a plunger? Give 3 reasons how this advantage is achieved.

Suppose that the concentration of electrons in n-type Ge at room temperature decreases linearly from 5 x 10^16/cm^3 to zero over an interval of 2mm. a) Calculate the diffusion current b) What is the value of the electric field required to produce a drift...

A steel ball is used to measure the viscosity of motor oil. The container used in this experiment has a bottom area of 20 cm^2. The steel ball is 3 mm in diameter. After the ball is dropped to the container it takes about 12 seconds to reach the bottom of...