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Calculate β for two transistors for which α=0.99 and 0.98. For collector currents of 10 mA, find the base current of each transistor.
Find the electrostatic potential on the axis of a uniformly charged cylindrical surface of radius ro and height h. The surface charge density is ρs.
A straight conducting wire of radius α isparallel to and at height h from the surface of the earth. Assuming that the earth is perfectly conducting, determine the capacitance and the force per
The open - loop transfer function for a unity feedback system isG(s) = K / s4 +7 s3 +9s2 +4s. Find the range of values of K for stability of the close -loop system.
The function f(t)=3cos(500πt) + 5cos(800πt) issampled digitally at a sampling rate of 400 Hz, starting attime t = 0.00025 s. (a)Calculate the frequencies that you would expect to see on afrequen
What is the relationship between discrete time fourier transform (DTFT) and Discrete Fourier Series (DFS)
A PN flip-flop has four operations, clear to 0, no change,complement, and set to 1, when inputs P and N are 00, 01, 10, and11, respectively. (a) Tabulate the characteristic table. (b) Derive the char
design a circuit to diplay the decimal equivalent of a 4-bit BCD value, input via swiches on the logic designer,on a seven segment display. use 7448 BCD to sevn segment decoder to do this. show the
Aportion of a power system consists of two generators operating inparallel, connected to a step-up transformer that links them with a230 kV transmission line. The ratings of these components are; Ge
Suppose one is given a modulo-2N counter that consists of N "T" flip-flops running on a 1.0 Hz clock source. Using an external input line, convert the counter into a stop watch, which starts and sto
At t = 5s, the energy stored in a 2-H inductor is 200J and is increasing at 100J/s. Determine the voltage magnitude and current magnitude at t = 5s. Does the current enter or leave the positive ter
If the peak-peak voltage of a sinusoidal waveform extendsvertically 6.4 division and the oscilloscope vertical sensitivitywas set to 0.5 volts/division, what would be the reading of amultimeter usin
A cube ( each side of the cube has length 15 mm. ) of germanium passes a current of 25 mA when 9 mV is applied between two of its parallel faces. Assuming that the charge carriers are electrons that
a sine wave signal (20 V PP) is connected to a 10k ohm resistor. Calculate the current through the resistor in terms of average,rms, and peak currents. what wattage rating should the resistor have
Suppose a signal from a vibrating motor is to be sampled discretelywith a digital data acquisition system to determine the RPM of the motor. It is known that the maximum possible RPM is 1800.
Assume that all numbers are signed binaryintegers. The final quotient must be an 8-bit number stored in the AL register, and all registers other than AX (that is, AH and AL) should hold the same con
For the system used in this lab, suppose the voltage tobe measured in a certain experiment is always positive, and neverexceeds 2.5 V. How many of the 16 bits of the A/D converter are effectively ut
The input resistance of the recorder is unknown andlikely to be variable, but it is greater than 10kΩ. Adeflection of 1 cm per milliampere of cell current with anaccuracy of about ±3 pe
A three-phase, 13 kV transmission line delivers 8 MVA of load. The per-phase impedance of the line is (0.01 + j0.05) pu,referred to a 13 kV, 8 MVA base. What is the voltage drop across the line
What is the minimum sampling frequency to be able to avoid aliasing if your system has 10Hz, 100Hz and 1500Hz mixed in a signal
A cuboid of Germanium (Ge) has contacts all over its 2 x 1 mmends and point contacts exactly half way along its 5 mm length, atthe center of the 5 x 1mm faces. A magnetic field can be appliedparalle
find the quasi-fermi levels and the change in conductivity of the sampleupon shining the light. electron and hole life times are both 10us. Dp(diffusivity of holes)= 12cm^2/s Dn(diffusivity ofelectr
for a Si conductor of length 5um, doped n-type at 10^15 cm^-3,calculate the current density for an applied voltage of 2.5 Vacross its legth. how about for a voltage of 2500V the electronand hole mob
Design a two-way radio link to operate over earth-Mars distances for data and picture transmission with a Mars probe at 2.5Ghz with a 5-MHz bandwidth. A power of10-19 W Hz-1 is to be delivered to th
A load operating at 2300 V rms draws 28 A at a power factor of 0.812 lagging. Find (a) the peak current in amperes; (b) the instantaneous power at t=2.5 ms assuming an operating frequency of 60 hz;