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Define the problem of hidden Exposed terminals. What happens in the case of such terminals if Aloha, Slotted Aloha, reservation Aloha or MACA is used?
A PWM is used in 8-bit mode to produce a signal with a 1 msec period and 60% duty cycle. Determine the value required for any pre-scaling, and the values for the period, and duty cycle registers. The E-clock is 24 MHz.
A 4 to 20mA control signal is loaded by a 100Ohm resistor and must produce a 20 to 40V motor drive signal. Develop the equation relating the input current to the output voltage.
A 100 hp, 16 pole, 460V, three phase, 60hz induction motor has a slip of 2.4 percent when running at rated conditions. Determine (a) synchronous speed; (b) rotor speed (c) rotor frequency.
Determine the open-circuit voltage VL. - If the 2.2-kΩ resistor is short circuited, what is the new value of VL?- Determine VL if the 4.7-kΩ resistor is replaced by an open circuit.
To simulate a continuious-time system with input x(t) and impulse response h(t) using a digital system, one can first sample x(t) and h(t) to obtain x[n] and h[n] respectively and then perform a discrete-time convolution between x[n] and h[n]
a square plate of 50x50 pixels size placed at the origin of the x-y plane of a camera coordinate system is sheared vertically so that the point (49,0) moves to (49,10), and then rotated by 30 degrees.
Simulate the AM demodulator in the EIA on page 122. Compare the spectra of the voltages across the two capacitors. The full-wave rectifier in Fig. P3.104 is operating at a frequency of 60 Hz, and the rms value of the transformer output voltage is ..
Two coils wound on a common core have L1 = 0.2 H, L2 = 0.5 H, and M = 0.1 H. The currents are i1 = exp( -1000t) A and i2 = 2 exp( -1000t) A. Both of the currents enter dotted terminals. Find expressions for the voltages across the coils.
Consider the signal x(t)=e^-at where a is a positive number. Determine the Fourier Transform of and plot both the magnitude and the phase angle as a function of the frequency.
A piston-cylinder device initially contains 1 m of nitrogen gas at 400kpa and 27 c. A resistance heater is turned on inside the cylinder which passes 70 kj of electricity to the nitrogen gas.
Consider the circuit shown in Figure. Prior to t = 0, v1 = 100V, and v2 = 0. Immediately after the switch is closed, what is the value of the current [i.e., what is the value of i(0+)]?
The known quantities in given series RL circuit are asfollows: resistance equals 8-ohm, inductive reactance equals 39?current equals 3A, and the applied voltage is 120- volts 60 Hz.Determine the following unknown quantities
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