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1. What is the distance between the nearest Ga atoms in a GaAscrystal.2. The de Broglie wavelength of a particle λ=h/mvdescribes the wave-particle duality for small particles such aselectrons. What is the de Broglie wavelength of an electron at150eV? what is the wavelength for electrons at 10keV, which istypical of electron microscopes? Comparing this to visiblel light,comment on the advantages of electron microscopes.
Analysis of link budget DTH QPSK Satellite link, A direct-to-home satellite television system uses a geostationary satellite in orbit above the equator at a longitude of 109 degrees west.
(a) If E=Exax andH=Hyay, begin with Maxwell's equations anddetermine the second order partial differential equation that Ex must satisfy. (b) Show that Ex=E0 cos (ωt-βz) isa solution of that equation for a particular value of β.
Some of this is due to high frequency effects, and some is due to the relationship of the wavelength of the signal being set over the wire to the length of the conductor. describe both of these limitations and their effects
(a) Impulse Response of a DT LTI system is given by h[n]=(.2^n)u[n] Determine the step response of y[n] of the system for all n. (b) Given h[n]=(a^n)u[n] and x[n]=(.2^n-5)u[n-5] Evaluate y[n]=h[n]*x[n] for
A transmitter is using a 2B1Q and operating at 3 Mbps. What is the minimum bandwidth necessary on the transmission line for successful communication
A residential four-wire system supplies power at 220V rms to the following single-phase appliances: On the first phase, there are ten 75-W bulbs. On the second phase, there is a 750-W vacuum cleaner with a power factor of 0.87.
If we have a 600ohm transmission line terminated with a 1200ohm resistor, how long must the transmission line be if the input impedance is purely real?
Write a program to count the number of even elements of an array of N 16-bit elements. The array is stored at memory locations starting from $900. Use assembler
A 10 kHz signal modulates a 500 MHz carrier, with a modulation index of 2. What are the maximum and minimum values for the instantaneous frequency of the modulated signal
A silver(Ag) electrode and a zinc(Zn) electrode are placed in the same electrolyte and connected to a voltmeter in a voltaic cell. The resistance of the volt bridge and electrolyte solution is 5k Ohm.
A 230 V DC series motor has an armature circuit resistance of 0.2 and a eld circuit resistance of 0.1. At rated voltage, the motor draws a line current of 40A and runs at a speed of 1000 rpm.
A diode is connected in series with a 30-V rms source to charge a 12-V battery with an internal resistance of 0.1 ohm. Specify the series resistance necessary to limit the peak current to 2A. Estimate the time required to recharge a 10-A hr batter..
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