N-type semiconductor, Electrical Engineering

a)  Sketch the variation of electron concentration with temperature for

i)  an n-type semiconductor doped with 1021  donors m-3

ii)  an intrinsic semiconductor.

 b)  Explain briefly why the intrinsic carrier concentration at a given temperature is greater for germanium than for silicon. 

c)  At a temperature of  293 K an intrinsic semiconductor has an electron mobility of  0.12 m2V-1s-1 and a hole mobility of 0.07 m2V-1s-1.

If its resistivity is 35 :m, calculate the intrinsic carrier concentration. Hence calculate the hole concentration when the semiconductor is doped with 1021 donors m-3.  

d)  If a voltage of 0.5 V is applied across the opposite faces of a sample of the above intrinsic semiconductor (in part c) of thickness 0.2 mm, determine the approximate total current density and the average drift velocity of the holes.

Posted Date: 2/27/2013 1:52:55 AM | Location : United States







Related Discussions:- N-type semiconductor, Assignment Help, Ask Question on N-type semiconductor, Get Answer, Expert's Help, N-type semiconductor Discussions

Write discussion on N-type semiconductor
Your posts are moderated
Related Questions
For the amplifier circuit shown in Figure with R i ≅ ∞,R o ≅ 0,A = 10,R L = 100 , and v in = 1 V, calculate the power dissipated in the amplifier if the voltage at the power-s

Next, let us consider the case of a balanced delta-connected load with impedance of 5 45° supplied by a three-phase, three-wire 100-V system, as shown in Figure (a). We shall dete

Transistor Switching Circuit Design a) Sketchy a schematic diagram showing how a transistor can be used to control the operation of a relay b) Determine what is meant by ba

Q. Explain from the drain characteristics that a JFET has  infinite resistance? When V GS = 0v when a positive voltage Vds has been applied across the channel and the gate

Q. Regions of operation in BJT ? Transistor find many applications like amplifier, switch etc. depending upon the polarity and the magnitude of the applied voltages across the

Define a voltmeter A voltmeter is an instrument used to measure p.d. and must be linked in parallel with the part of the circuit whose p.d. is required.

Q. Explain the classification of amplifiers on the biasing conditions? Based on the amount of transistor bias and amplitude of the input signal, amplifiers can be classified as

Explain indirect data addressing mode (with examples) available in microprocessors. Indirect Mode: Address given in instruction includes address where the operand resi

Q. For the circuit shown in Figure(a), determine the diode current and voltage and the power delivered by the voltage source. The diode characteristic is given in Figure.

Both DTL and TTL are based on the saturating BJT inverter. The transistor acts as a switch that connects or disconnects the collector and emitter. The switch is closed when suffici