Describe the functions provided by the microcontroller PIC24FJ256GB106 whihc is used in printers such as HP Office Jet 6000?
only functionality, no features needed
In: Electrical Engineering
Design an experiment setup for determination the time constant of a thermistor?
In: Electrical Engineering
energy and power of signals.
(a) Plot the signal x(t) = e−tu(t) and determine its energy. What is the power of x(t)?
(b) How does the energy of z(t) = e−∣t∣, −∞ < t < ∞, compare to the energy of z1(t) = e−tu(t)? Carefully plot the two signals.
(c) Consider the
signal
y(t)
=
sign[xi(t)]
=
1
xi(t)
≥
0
−1 xi(t) < 0
for −∞ < t < ∞,i = 1,2. Find the energy and the power of y(t) when (a)x1(t) = cos(2πt) (b)x2(t) = sin(2πt)
Plot y(t) in each case.
(d) Given v(t) = cos(t) + cos(2t).
i.
Compute the
power of v(t).
ii.
Determine the
power of each of the components of v(t),
add
them and compare the result to the power of v(t).
(e) Find the power of s(t) = cos(2πt) and of f(t) = s(t)u(t). How do
they compare?
Answers: (a) Ex = 0.5; (b) Ez = 2Ez1; (c) Py = 1; (d) Pv = 1.
In: Electrical Engineering
Sketch the energy band diagrams for metals, insulators and semiconductors and explain the how they differ based on the bandgap, density of states and conductivity.
In: Electrical Engineering
Two common load components for electrical energy is Heat (Heater) and Light (Lamp).
Please research the material used to construct these load elements and provide a summary.
1- Performance Property of Material
2- Different materials used
In: Electrical Engineering
1. Explain briefly the operation of a bi-polar transistor as a switch.
In: Electrical Engineering
a. Calculate the electron density (your unit should be correct)
for a CNT at T = 0K. Assume that the Fermi level is at Ef = 1eV and
the bottom of the conduction band is at Ec = 0.8eV. Use 1D density
of states (DOS). Electron effective mass = 0.5m0
b. Will your result change if the Fermi level is at Ef = 0.8eV and
the bottom of the conduction band is at Ec = 0.6eV.
In: Electrical Engineering
5.4 Explain the following terms:
(a) calibration chain
(b) traceability
(c) standards laboratory
In: Electrical Engineering
Briefly describe (10 to 15 sentences) how an analog oscilloscope displays a periodic waveform. Assume the trigger is set to the same channel as the periodic waveform being displayed. Be sure to clearly describe the relationship between the trigger, oscillating signal, and CRT sweep rate. The reader should have a good idea why a periodic waveform appears stationary on the oscilloscope. You can sketch diagrams if that helps your explanation.
In: Electrical Engineering
1. Give an example in which regression toward the mean might occur?
2. Write out an example of a question and responses, using EGWA scale?
In: Electrical Engineering
lab report about following
Note ** Should has examples **
Note ** Work through the Word program
**
Lab 1 - capacitors
Lab 2- indactor
Lab 3 - resistor
Lab 4- Ohm's law
Lab 5 - KVL
Lab 6 - KCL
Lab 7 - series and parallel circuit
In: Electrical Engineering
A television signal is broadcasting over a suitable
band. The initial frequency of the
band is 270(MHz)
Sketch a neat spectrum of Television transmission as
per NTSC and PAL system.
Clearly mention the picture, sound and color position on it.
In: Electrical Engineering
In: Electrical Engineering
(i) Semiconductors are useful as electronic devices because
They are very abundant in nature
They are all good conductors
They have a very high melting point
Their electrical conductivity can be controlled by the addition of impurities
Their electrical conductivity can be controlled by a variation in the temperature
Explain why you chose this answer:
(ii) The magnitude of the electronic bandgap in a solid is primarily determined by
The temperature
The number of free electrons in the material
The nature and strength of the chemical bond in the material
The type of doping in the material
Will decrease when we apply a positive voltage
Explain why you chose this answer:
(iii) The number of intrinsic carriers in a semiconductor
Will be determined by the temperature and the bandgap of the material
Is always greater than the extrinsic concentration
Is always less than the extrinsic concentration
Is determined by the doping level in the material
Will determine the conductivity of the material
Explain why you chose this answer:
iv) When doping a semiconductor n type, the bandgap of the material will:
Increase
Decrease
Remain the same
Will decrease when we apply a negative voltage
Will decrease when we apply a positive voltage
Explain why you chose this answer:
In: Electrical Engineering