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A periodic signal consists of the exponentially decreasing wave form e^(-at), 0<t<T, repeated every T seconds. A given signal f(t) is multiplied by this periodic signal. Determine an expression describing the spectrum and the time waveform of the resulting amplitude-modulated signal if all componets except those centered at + Wc, Wc = 2π/T, are discarded?
plane polarized light is sent through two consecutive polarizers, the first having its plane of polarization in the same direction as the incident light and the second having its palne at 90 degrees to the original plane of polarization.
A dc series motor of 230 V, 12 hp, 1200 rpm is connected to a 230 V supply. It draws a current of 40 A, and rotates at 1200 rpm. Ra = 0.25 ohms and Rs = 0.1 ohms. Assume magnetic linearity.
Determine the system impulse response in time domain and draw its root locus and comment on system stability.
If the per-phase line loss in a 60-km-long transmission line is not to exceed 60kW while it is delivering 100A per phase, compute the required conductor diameter, if the resistivity of the conductor material is 1.72*10^-8 Ohm-meters.
Looking at this pattern from left (MSB) to right (LSB), when you see a ‘1' the pulse should be 'ON' for 0.5 seconds. If you see a ‘0', the pulse should be ‘ON' for 1.5 seconds. In either case, the ‘OFF' time should be 2.0 seconds after each ‘ON' t..
Let the random variable X denote the annual snow fall amount at a well known Utah ski resort. X has a normal distribution with mean 500 inches and standard deviation 50 inches. (a) What is the probability that in a given year the snow fall will be ..
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.
A 1 kHz sine wave signal with a power level -10 dBm is applied to the input of the amplifier. What is the power at the amplifier output?
One of the firm's suppliers discounts prices for larger quantities. The first 1000 parts are $13 each. The next 2000 are $12 each. All parts in excess of 3000 cost $11 each. What are the average cost and marginal cost per part
If the motor is driving a load whose torque requirement remains constant at 3Nm, independent of speed. Calculate the armature voltage Va to be applied in steady state, if the load to be driven at 1500RPM.
A production plant has a requirement for a counter that will count 4,000 times before recycling and starting over. How many flip flpos are required?
Presuming that oscillations in wavefunction amplitude lead to oscillations at the same frequency in the charge density, and that the charge density at any point in the structure give rise to radiated electromagnetic radiation at the same frequency
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