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suppose you are driving a car listening to a FM radio. Fm receiver has an input resistance of 100 ohm. Signal received by your car antenna is 15*10^-6V[rms]. Peak voltage measured at the loudspeaker of the car is 7V. Find out the resistance offered by the car loudspeaker such that the power gain of the receiver is 130dB.
When a capacitor is connected to a DC source its voltage rises from20 V to 36 V in 4μs with an average current of 0.6 A. Determine the value of capacitance.
Find the amount of electrical energy exdpended in raising the temperature of 45 litres of water by 75°C. To what height could a weight of 5 tonnes be raised with the expenditure of the same energy.
Suppose that OFDM is used with 15 kHz subchannels. (Two subchannels are used as guard channels on either side of the band.) Specify an OFDM symbol rate and modulation format for each subchannel that can achieve the target rate.
A new 24-bit processor is being designed for operation in a cell phone (you can assume the word-size is 24 bits). Suppose the following memory values are being stored in memory that is organized where each location is 8-bits wide (byte addressable..
design a 4 bit register with 4 different kinds of flip flops, that has at least 12 different functions. list clearly the functions. Do something creative, and say exactly your innovation. at least one flip flop should have some input besides a mul..
Sketch magnitude and phase responses (as linear gain versus digital frequencies) for each filter (use [0,π]). Indicate filter type. Find cutoff frequencies if sampling frequency in 30 kHz. Use 6 points only. Do not use MATLAB.
A shunt dc motor has RA= .1 ohmn and VT = 440 V. For an output power of 50 hp, we have nm=1500 rpm and IA = 103 A. The field current remains constant for all parts of this problem.
the ends of a length of wire are labeleda and b. If the current in the wire is iab = -3A, are electrons moving toward a or b? How much charge passes through a cross section of the wire in 3 seconds?
A single phase transformer has the following rating: 120 kVA, 2000 V/100 V, 60 Hz with 1000 primary turns. Determine (A) the maximum flux. (B) given a maximum flux density of 0.25 T, the cross-sectional area of the core.
The current flowing through a 300-mH inductance is given by 5e(-200t). Find expressions for the voltage, power, and stored energy. Sketch the waveforms to scale for 0
Determine and plot the value of x[n] using the synthesis equation directly {do not use ifft()}. What is the percent difference in x[n] energy between the direct method used here and MATLAB function used in part (c).
In the lucky drift model for impact ionization, it is assumed that some lucky carriers are accelerated ballistically (i.e. without scattering) to energies above threshold, causing impact ionization. Assume that average relaxation time is 0.05 ps.
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