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(a) a resistace heating element fed from an AC bus is controlledby an AC ( semi-conductor ) switch with integral half cyclecontrol. the base period is 20 half cycles of the AC supply.determine the number of half cycles for which the AC switch shouldbe gated to bring down the heating power to 30 % of the maximum.
(b) a single phase resistance load is supplied from a 120 V AC busin sereies with phase controlled static AC switch. The firing delayangle is 60 degree. determine the rms value of the load voltage. If we had used integral half cycle control with a base period of 20half cycles, what would be the equvalent numer of on half cyclesfor the same load power.
(c) An AC load circuit consists of a resistance of 30 Ω in sereiswith an inductance of 0.2 H. It is fed from a 120 V, 60 Hz AC source.determine the conduction interval in half cycle for a firing delay of 100 degree.
A ‘c-core' inductor has a total air-gap length of 3 mm and a cross-sectional area of 100 cm2. Two coils are wound on the core - one of 500-turns and another of 250-turns. Assuming the iron reluctance, fringing flux and leakage flux to be negligibl..
A He-Xe mixture containing 0.75 mole fraction of helium is used for cooling of electronics in an avionics application. At a temperature of 300 K and atmospheric pressure, calculate the mass fraction of helium and the mass density.
A d-c voltage Vo is applied att = 0 directly to the input terminals of a lossless air dielectric transmission line of length l. The line has a characteristice resistance Ro and is terminated in a load resistanceRL =2Ro.
Design lowpass IIR filter with the following specifications: Filter order = 2, Butterworth type Cut-off frequency=800 Hz Sampling rate =8000 Hz Design using the bilinear z-transform design method
a)What is the voltage across a 220-ohm resistor if the current through it is 5.6 mA b)What is the current through a 6.8-ohm resistor if the voltage drop across it is 24V c) What is the power delivered by a 6 V battery if the current drain is 750mA
A variant of the binary symmetric communication channel described in class is called a binary erasure channel. The transmitter sends a ‘0' or ‘1,' but at the receiver there are three possibilities: a ‘0' or ‘1' or ‘undecided bit..
The complex permittivity for bottom round steak is about epsilon = 40(1 - j0.3)*epsilon0(e0) at the operating frequency (2.5 GHz) of a microwave oven. What is the penetration depth
Since smart grid application is expected to have a substantial societal benefit in addition to the direct benefit to electric power customers and utility companies, how should the expected huge cost of smart grid infrastructure installation paid
In Mips when you use addi or any other commands in which you use a 16 bit value for a reg. value or address offset what operation is done to check if its is a negative number's two's complement or just a regular binary number
A communications channel has a bandwidth of 2,000 Hz and a signal-to noise-ratio (SNR) of 20 dB. What is the maximum possible data rate
1) Determine the transfer of second-order highpass filter with a cutoff frequency of 900 Hz and passband gain of 1 using a butterworth type. 2) Design a filter for your transfer function using the sallen-Key topology.Find all the values of the circ..
Two cards are drawn at random from a single well-shuffled deck of playing cards. What is the probability of drawing the ace of spades followed by the jack of hearts. What is the probability of drawing an ace and a jack (in either order).
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