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A plane electromagnetic wave of frequency 300 MHz propagates in homogeneous sea water (ε=80,σ=1) along the z-axis. The effective field strength at the excitation point(point of origin)
The low pass filter G(s)= (s+5)/(s+10) is given. Derive the forced response y1(t) for x1(t)=10exp(-0.1t). Write an expression for the forced response y2(t) when the input is x2(t)=12exp(-0.1t)cos(2t).
(a) Find the inverse Laplace transform of df(t)/dt by differentiating f(t) and then using the Laplace transformtables.(b) Find the inverse Laplace transform of df(t)/dt by using the theorem for differ
suppose that in the fluid-low analogy for an electrical circuit analog of electrical currentis volumetric flow rate with units of cm^3/s. For a proper analogy to electrical ciruits, must the fluid b
A harmonic wave traveling along a string is generated by an oscillator that completes 180 vibrations per minute. If it isobserved that a given crest, or maximum, travels 300 cm in 10s,what is the wa
vehicle of mass 1400Kg is traveling at a speed of 50km/hr. What is the kinetic energy stored in its mass Calculate the energy that can be recovered by slowing the vehicle to a speed of 10 km/hr.
A constant torque of 5Nm is applied to an unloaded motor at rest attime t = 0. The motor reaches a speed of 1800rpm in 4s. Assumingthe damping to be negligible, calculate the motor inertia.
1) Design inverting amplifier circuits with gains of 1, 10,and 100, and show the component values. 2)Calculate the inverting amp output at each gain setting for V2 is1.0Vpp at 100Hz
The signal generated by a source with 50 ohm impedence is to beattenueated by a factor of 10. The output impedence of the sourcefollowed by the attenuator should also be 50 ohm. Choose values forth
Two stages are cascaded to result in an overall gain of 680 V/V.The loaded gain of the first stage is 36 dB. What must the gain ofthe second stage be in dB to satisfy this specification In V/V
A U.S Department of Energy report estimates that over 100billion kWH/year can be saved in the United States by variousenergy conservation techniques applied to the pump-driven systems.
A first order lowpass filter is operating in sinusoidal steady state conditions at a frequency of 2 kHz. It is determined that the positive peak of the output is delayed by 0.1 ms compared with the
A three phasestar connected alternator with synchronous impedance of 1+j5 ohms per phase is connected to an 11kV system. The alternator power outputis found to be 10MW and reactive power output as 3
A three phase star connected alternator has synchronous impedance of 1+j10ohms per phase. It is operating at a constant voltage of 6.6kV and its field current is adjusted to givean excitation voltag
One of the machines which has a synchronous reactanceof 50% and a resistanceof 1% delivers a power output in kW equals to 70% of its rated kVA. If the mf of this unit equals 1.2 times the terminal v
A 30kVA, 50 Hz, 4 pole alternator connected to an infinite bus at rated voltage has Xd = 1.00pu and Xq = 0.6 pu. For zero excitation find the output interms of rated power that the machine can deliv
A certain antenna has a radiation resistance of 51 ?, and an ohmic (loss) resistance of 10 ?. If a current of 2 A is driving the antenna, calculate the following: a) the power radiated. b) the power
In AM, spectral overlap is said to occur if the lower sidebandfor positive frequencies overlaps with its image for negativefrequencies. What condition must the modulated wave satisfy if weare to avo
1.) If the threshold of outage is β >0, the outage probability of one branch is what 2.) What is the outage probability of a system with M diversity branches where pure selection scheme is emp
Given a used area of 2016 ft2 and unused area of 2000ft2, (a) find the minimum number of 25-amper lighting branch circuits required for residence, (b) how many outlets are permitted on a lighting br
When a voltage v(t)=250 sin[314t-(pi/4)] is applied to a circuit,the current in the circuit is found to be i(t)=50 sin[314t-(pi/2)] amperes. Find the circuit elements,power & power factor.
a). Without calculating E(z), find its poles. b). Give the rule that you used in part (a). c). Verify the results of part (a) by calculating E(z). d). Compare the zero of E(z) with that of E(s).
The electric field intensity of a linearly polarized uniform plane wave propagating in the +z direction in seawater is E= 100 cos(10^(7) pi*t) V/m at z = 0. constant of emissivity = 8.854 * 10^(-12)
s(s^2-10+k(15s^2+2s+1)=0 Is the characteristic equation for a system in which K is a variable proportionnality factor. The system is known to be stable whrn K takes on certan values. for what range
The threshold voltage is eight times larger than the absolute value of the bulk potential, while the oxide is 20 nm thick. Find the doping density of the substrate and indicate whether the substrate