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1. Considering the second hand on your watch to be a vector, state its polarization. What is the frequency?
2. What is a phasor?
3. Is there any relationship between a phasor and a vector? Explain.
4. Describe the phasor technique of adding two sinusoidal functions of time.
A current source of 4 cos cot is connected across a 10 Ω resistor and 20 mH inductor in series. Find the phasor voltage and the real-time voltage across the series combination if the angular frequency is 377 rad/s.
Design a two-pole low-pass Butterworth active filter using a unity-gain section to achieve a 3-dB frequency of 200 Hz. Select the two filter resistances as 30 kOhms each.
Design a synchronous sequential circuit to control the operation of an automatic coffee machine. A cup of coffee costs 15cents and the machine has two input slots. In one slot Only 10cent coins can be inserted , in the the other only 5cent coins.
A 50 hp, 460 V, three phase induction motor draws 61 amps when operating at rated voltage and at a power factor of 0.85 lagging when supplying a rated load. knowns: 1hp=746watts effeciency (n) = Pout/Pin = Pout/(Pout+losses)
define a one-dimensional potential well having energies U as a function of position x as follows: U=infinity for x= -1nm to x=0; U=0 eV for x=0 to x=5nm; U=10 eV for x=5nm to x=7nm; U=0 for x>7nm and x
Consider the induction motor shown in Figure. Redraw the figure showing the current directions in the rotor conductors, the magnetic rotor poles, and the direction of the developed torque if a prime mover drives the rotor at a speed higher than sy..
Water is being heated in a vertical piston-cylinder device. The piston has a mass of 15 kg and a cross-sectional area of 120 cm^2. If local atmospheric pressure is 99.5 kPa, determine the temperature at which the water will start boiling.
A silicon diode has a doping profile such that ND = ax3. What is the depth of the junction assuming the p side is uniformly doped with NA per cubic cm. Assume the x origin is at an ideal ohmic contact on the n side of the diode.
The purpose of this lab is to help you understand the relations between the z-transform, H(z), the pole-zero plot, the frequency response, H(w), and the impulse response, h[n].
The received power at a receiver antenna is -38 dBm. If the system impedance is 50 Ohms, what is the voltage at the receiver antenna
On the right side, we have an inductor and a impedance 2+4i and another impedance 20
Calculate the smallest area of the RCS pf the target if the transmitters peak power is 1MW, frequency =10GHz, sensitivity ofthe receiver is -100dB/W, antenna gain is 50dB. Perform the calculation for the reference condition.
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