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ABC is a scalene triangle of sides a,b,c. At the vertices A,B,C infinitely long current filaments pass at right angles to the plane of A,B,C. Determine the magnetic field at the cross section of med
A continuous-time signal x(t)=tri((t-1)/2) is sampled at three rates: 10, 2, and 1 Hz. Sketch the resulting sampled signals. Because x(t) is timelimited, its bandwidth is infinite. However, most of
When a sinusoidal signal is used to frequency modulate a VHF carrier, the required bandwidth is 200 kHz. It is desired to retain the same modulation index while reducing the necessary bandwidth to 1
A 240V, short shunt, cumulative compound generator is rated at 100A. The shunt field current is 3A. It has an armature resistance of 50 milli-ohm, a series field resistance of 10 milli-ohm a field d
Design an input and output circuit state m/c Circuit normally produces an output = 1. It continues to produce output = 1 as long as the following is true: This circuit accepts "at most" one set of s
Find the output y[n] of an LTID system specified by the equation 2y[n+2] - 3y[n+1] = y[n] = 4x[n+2] - 3x[n+1]if the initial conditions y[-1] = 0, y[-2] = 1, and the input x[n] = (4)^-n u[n]
Consider a superheterodyne FM receiver designed to receive the frequency band of 88 to 108MHz with IF frequency 10.7MHz. What is the range of frequencies generated by the local oscillator for this
A transmitter transmits an AM sinal with a carrier frequncy of 1530kHz. When an inexpensive radio receiver (which has a poor selectivity in its RF-stage bandpass filter) is tuned to 1530kHz, the sig
The line current is 51 A and the shunt-field resistance is 120 ohm. If the armature resistance is 0.1 ohm, calculate the speed if the shunt-field resistance is doubled at no load condition. Suppose
Suppose a standard single-phase transformer that has a rating of a 15 kVA, 600V/120V, 60 Hz is reconnected as an autotransformer to obtain 600 V primary to 720 V secondary voltage ratio.
While an inductor is being energized the current flowing through it as a function of time is: i(t) = 56 (1 - e(-4600 · t) ) mA, for all times t > 0 and t is in seconds. What is the inductanc
a differential protection system with a power transformer 450MVA, 230/115kV, determine: a. The current line on both sides of the power transformer b. Based on these current selection for the cts from
Compare the performance of the basic latch (build with 74LS00 NAND gate), the master-slave flip-flop (7476), and the edge-triggered flip-flop (74LS76). What are the advantage and disadvantage of eac
A large brass washer has a 2-cm inside diameter, a 5-cm outside diameter, and is 0.5 cm thick. Its conductivity is s = 1.5 × 107 S/m. The washer is cut in half along a diameter, and a voltage
A 160-ft-diameter parabolic antenna is driven by a 10-W transmitter at 4.3 GHz. Calculate its effective radiated power (ERP) and its beamwidth.
A BC has CR of 15:1 with a high temperature of 1.6x10^3 K and the inlet at 290 K, 10^5 Pa. Use cold air properties and find the specific heat addition and specific net work output.
Specify the range required for the control voltage VGS and the required transistor width W. It is required to use the smallest possible device, as limited by the minimum channel length of this tech
A sinusoidal modulating waveform of amplitude 4V and frequency 1 kHz is applied to an FM exciter that has a modulator gain of 50 Hz/V. What is the peak frequency deviation. What is the modulation ind
i) Identify the PSK type and calculate the bandwidth if the modem is transmitting with 9600bps and 2400 baud. ii) Suggest a way to reduce the baud rate to 1200 baud and calculate the new bandwid
A constant current of 10 mA charges a capacitance of 50 µF that was initially charged to 22 V. How much time goes by before the capacitor's stored energy reaches 590 mJ
a single phase 440V 80kW load with a lagging Pf of .8 is supplied through a feeder of .6+j1.6 ohms and a single phase 100 kVA, 220/440 V transformer. the equiv impedance of the transformer referred
what are the most important factors that should be considered when designing a parabolic dish antenna Compute the directivity, beam-width and effective area for a 6m diameter dish antenna for which il
How much we need to pay for the electricity cost in 61 days when a water-desalination machine runs normally from 8AM to 4PM every day. (It draws 25A in its warming-up time (15 minutes) and draws, on
Design a Logic Probe that indicates the logic state of a node of any TTL circuit using two LEDs (a red one, and a green one). The probe must work with the same power of the circuit that you want to