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A permanent magnet DC motor with a 10 ohms armature is stopped by dynamic braking. at operating speed, the counter EMF in the motor armature is 15 volts. What will be the peak current through the sw
A three-phase, 125-hp, 60Hz, eight-pole, 575-V, design B induction motor is to be operated from a 50-Hz system. Determine (a) allowable voltage at 50 Hz; (b) allowable shaft load in horsepower; (c)
A three phase transformer is constructed from three 3kVA transformer. Secondaries are wired in Delta configuration with a balanced load. What is the maximun combined power that can be delivered to th
a) Generate the State Transition Table, which should include the binary( ones and zeroes) values of the Flip Flop inputs which then enable you to determine next states based on current states. b) Dr
Input Xi and Yi of each Full Adder circuit in an arithmetic circuit has the digital logic specified by the following Boolean functions: Xi =Ai Yi = B*iS + BiCin* Where S is a selection variable, and
The pre- Limiter circuitry has a Noise Figure of 8dB and an input Noise Temperature of 1800C. Given an FM demodulation noise improvement of 17dB, determine the minimum receive signal power to achiev
What is the minimum output voltage of the Ratio detector. When the maximum discriminator output voltage is fed into an audio amplifier, the amplifier drives 100 Watts into an 8 ohm load. What is the
Two transistors have EBJ areas as follows: AE1 = AE1 = 400μm x 400μm and AE2 = 0.4μm x 0.2μm. If the two transistors are operated in the active mode and conduct equal collector currents
Consider variable threshold CMOS fabricated in 0.25-mm technology with tox = 7 nm. The n-MOSFETs and the p-MOSFETs have 2 x 10^16 cm^-3 channel doping; ±3.3 V is available for active body bia
Two transistors, fabricated with the same technology but having different junction areas, when operated at a base emitter voltage of 0.75V, have collector currents of 0.2mA and 5mA. A. Find Is for e
A separately excited dc generator produces 400 v at 1500 rpm under open circuit conditions. Find the induced emf if the speed changes to 2000 rpm. Assume the flux is constant.
A 3kw, 120V, 2400 rpm shunt motor has an armature resistance of 0.4 ohms and a shunt field resistance of 160 ohms. The motor operates at full load. The no load current is 2A. If an external resistan
Discuss how the electricity can affect health and safety. the discusiion also must include the explanation on how to prevent the hazard of the electricity. then give three examples of the latest haz
Find the longest allowable evaluate time if the decay in output voltage is to be limited to .2V. If the precharge interval is much shorter then the maximum allowable evaluate time, find the minimum
A 50 kw, 120 - V shunt generator has Ra = 0.09 ohm, Rfw = 30 ohm and external field resistor Rfx = 15 ohm. The generator delivering the rated load at terminal voltage. a. find generated emf Ea
The output power of the digital transmitter is 0 dBm and the link has a constant attenuation of 50.0 dB. At the input to the receiver, the equivalent AWGN noise power is – 70 dBm. Assume i
A Building produce 400 V at 200 A. using individual photovoltaic cells that each produce 0.5 V at 1 A . Include a schematic diagram of your design idea. How many photovoltaic cells are needed for yo
A current I = 20 <30deg A flows through an impedance Z = 40 <-22deg Ω. Find the apparent power delivered to the impedance.
A 110 V rms, 60 Hz source is applied to a load impedance Z. The apparent power entering the load is 120 VA at a lagging power factor of 0.707. Calculate the reactive power in the load.
A current I = 15√2 <30deg A flows through an impedance Z = 100 - j50 Ω. Find the time average power delivered to the impedance.
An AC motor with impedance Z = 4.2 + j3.6 Ω is supplied by a 220 V, 60 Hz source. Determine the reactive power delivered to the load.
The phasor voltage across a certain load is V = 1200√2 <-120deg V, and the load impedance is Z = 40 - j30 Ω. Determine the power factor and state whether it is lagging or leading.
1. What is the purpose of core in hollow solder wire 2. What is tinning, and why is it important 3. Why is safety so important when soldering 4. Why has lead-free solder replaced lead-based solder Be
Assuming that the feed point impedance of the complementary 0.475 l dipole is 70 + j0 ohms if it were fed in the center, calculate the distance Zf to use to obtain Zs = 50W for a signal frequency f
Sketch magnitude and phase responses (as linear gain versus digital frequencies) for each filter (use [0,π]). Indicate filter type. Find cutoff frequencies if sampling frequency in 30 kHz. Use 6