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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 themaximum. (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. Ifwe 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 ACsource.determine the conduction interval in half cycle for a firing delay of 100 degree.
Convert the following differential equation 5 (t) +4 (t) +3x.(t) + 2x(t) + 7u(t) - 5u.(t) + 2 (t) = 0 to state space form. Is this system marginally stable, asymptotically stable, or unstable when u(t) = 0 Determine stability by using the state sp..
A factory is to be supplied with 408Y/277 3 phase, 4 wire electrical service. The total estimated single-phase load is 25 kW, at .9 lagging power factor. The total estimated three-phase load is 250 kW at .85 lagging power factor.
Calculate the distance, D at which communication from the space craft will be lost again? Assume both antennas are ideal.
A Vs equals 1V source impedance 25ohms is connected by a switch to a 50-ohms lossless air transmission line 1 m long, terminated in a load of 30-ohms. At time t=0s, the switch is closed instantaneously to launch a step voltage down the line.
a 3 V voltage generator is depicted as a thevenin model, the impedence of the generator is represented by a parallel resistor-capacitor combination, the value of the resistor is 20 ohms and the value of the capacitor is 10 farad.
In 2012, Felix Baumgartner jumped from space 36.6 km above New Mexico he reached a speed of 834 mph in 4 minutes and 19 seconds. What was his speed in Kilometers per second and how many miles was he above the ground
An RL circuit takes a current of 7A that lags behind the 231-volt source by 35 electrical degrees. Calculate the power factor, impedance, resistance and inductance of the circuit.
determine the sum of the incremental cash flows for Alternative B-Alternative A First cost $: A=-50,000 B=-85,000 Annual operating cost/year: A=-8,600 B=-2,000 annual revenue/year: A=22,000 B=45,000 salvage value: A=3,000 B=8,000
The main mission of this project is to design and build a tap changer which is going to be fitted to power transformers for regulation of the output voltage to required levels for the Micro Grid. The tap changer system will consist of 9 changers with..
Box 1 contains 5 red, 6 white, and 9 blue balls. Box 2 contains 7 red, 8 white, and 4 blue balls. A ball is withdrawn at random from Box 1 and placed in Box 2. Then, a ball is taken at random from Box 2.
Design a common-emitter bandpass amplifier having 20dB voltage gain at frequency 1.6 MHz with a bandwidth of 80kHz, when driven by an ideal voltage source and loaded at the output by RL=100k ohm and Rs = 0 ohm.
The global radiation at the solar noon on a summer solstice in Albuquerque, New Mexico (latitude 35° N) is 60mw/cm^2. Assume that (a) 30 % of this irradiance is diffuse radiation and (b) the ground surrounding a PV module is non-reflecting
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