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Determine the thermal equilibrium concentrations of electrons no and holes po in uniformly doped silicon for the following conditions: a) T=300 degrees K, Nd=2x10^15 cm^-3, Na=0 b) T=300 degrees K, N
You have a 10 meter length of .5 cm diameter Nichrome wire. A24 VDC voltage is to be applied to it. The initial wire temp is 70degF. The final wire temp is 200 degF. What ids the initial currentand
Two capacitors one is 10pf the other is 25pf are connected in series and you want to replace them with a single capacitor with the following dimensions : area = 4cm2 plate seperation distance is 2 c
Use the fourh order trial solution of Wx=C0+C1x+C2x2+C3x3+.....to calculate the large deflection behaviour of an initially unstressed doubly clamped beam with a point load at its center.
Design a 2-bit count-down counter. This is a sequential circuit with 2 Flip-Flops and 1 input x.When x=0, the state of theFlip-Flops does not change.When x=1,the state sequence is11,10,01,00,11 and
Also, if the cursorreaches the end of the screen it should wrap around to the otherside of the screen. If no direction is designated, the cursorshould stay put. Also, the system should show the dir
An abc-phase-sequence three phase voltage source connected in abalanced wye supplies power to a balanced delta-connected load. Theload current Iab = 4<20°Ampheres rms. Determine the line curr
A digital system has three registers AR, BR, PR. Three flip flops provide the control variables for the system: S is a flipflop that is set by an external Start signal to start theoperation, and F a
a dc series with an unsaturated field and negligible resistance, when running at a cirtain speed on a given load takes 50A at 460V. If the load -torque variase as the cube of the speed. Calculate th
Metal sphere 1 has a positive charge of 8.0 nC. Metal sphere 2, which is three times the diameter of sphere 1, is initially uncharged. The spheres are then connected together by a long, thin metal w
The 288mH coil has 1000 turns and the coefficientbetween the coils is 1/3. The coupling medium isnonmagnetic. When coil 1 is excited when coil 2 open, theflux linking only coil 1 is 0.5 as large as
Radio systems sometimes suffer from multipath distortioncaused by 2 (or more) propagation paths between transmitter andreceiver. Suppose a channel output related to the input is: y(t) =K1x(t-t01)+K2
two magnetically coupled coils have self-inductances of 52mH and13mH, respectively. The mutual inductance between the coilsis 19.5mH. a. what is the coefficient of coupling b. for these two coils, wh
Calculate the drain current in an NMOS transistor for VGS = 0, 1V, 2V, and 3V, with VDS = 0.25V, ifW = 5μm, L = 0.5μm, VTN = 0.80V, and Kn' = 200μA/V2. What is the value of Kn
A 12-v automobile battery has an output capacity of 100 ampere-hours(Ah) when connected to a head lamp that absorbs 200watts of power. the battery voltage is constant. a) What is the current supplie
calculate the maximum (peak) percentage amplitude, phase and frequency error incurred in using the phasor approximations to narrowband FM for the sinusoidal case when a) β=0.20; b)β=0.50.
The current through a coil having a resistance of 6 ohms and inductance of 2 H is 4 ampere. Calculate the instantaneous value of the current 50 ms after the supply is cut off.
Calculate the speed and the current when the motor field winding is shunted bya divert or of equal resistance as that of the field winding.Neglect all motor losses and assume the magnetic circuit a
The 4:1 multiplexer function has four data inputs A,B,C,D, two select control inputs S1,S0 and a single positive-logic output Z that operates as follows. When S1,S0 = 00 gates A to Z; S1,S0 = 01 gat
A data transmission system uses messages of duration T seconds. After each message transmission, the transmitter stops and waits Tseconds for a reply from the receiver. The receiver immediately repl
A 12 V car battery delivers 150 A of current during startup. If it takes one second to start the car, how much energy is supplied by the battery during ignition
Two identical automobile headlamps are connected across a 12v battery. if the total current from the battery is measured to be 6.5 A, what is the current through each headlamps
IF a battery supplies 3 joule of energy in transferring 0.25 couloms of charge through an element, what is the voltage across the battery
The core loss of a 5 kVA single phase transformer with normal voltage applied to the primary is 75 Watts. The maximum efficiency occurs at 60% of full load kVA. What is the full-load efficiency of t
What are the advantages of a current controlled device over a voltage controlled device , and advantages of 4-20mA loop over a closed loop voltage