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A 2000 KVA, 4800-600V, 60 Hz, core type transformer operating at no load in the step down mode draws a magnetizing current equal to 2 percent rated current. The core has a mean length of 3.15 m, and is operating at a flux density of 1.55 T. The magnetic field intensity is 360A-t/m. Determine A) the magnitizing current; B) the number of turns in the two coils; C) the core flux; D) the cross-sectional area of the core.
Fuel Cell produces current by using H2. Anode reaction: H2-->2H+ + 2e- Cathode reaction: 4e- + 4H+ +O2 --> 2H2O. The rate at which Hydrogen enter the fuel cell is given as 5 L/min. The temperature is constant at 300K.
And how long it will take to reach that temperature assuming no heat lost in the process and comments on your results and may research the properties of nichrom wire to determine the resistivity of the wire
3-singlephase 2 winding transformers, each rated 500 MVA, 13.8/199.2 kV, with leakage reactance Xeq = 0.10 per unit, are connected to form a three-phase bank. Winding resistances and exciting current are neglected.
A 1cmx2cm rectangular wire loop carries a current of 2A. What is the magnetic field at the center of the rectangle
Consider an n-Si with doping of 9*10^16cm^-3. In a certain region of this sample, there is an electric field of 1000V/cm. Estimate the electron and hole drift velocity and the total drift current density in that region.
Derive an expression for the optimum value of the avalanche gain opt M for which the signalto-noise ratio (SNR) becomes optimum by using the following expression for the excess noise factor: Fa( M)=KM+ (1-K ) (2-1/M). Assume that M^3 >> M .
The feedback capacitance of an inverting amplifier is 10pF. What is the Miller capacitance at the input if the gain of the amplifier is -120 What is the Miller capacitance at the output of the amplifier
design the details of the D/A using a Weighted Resistor( NOT R-2R) technique, as well as the logic details of the sequencer/decision maker/state machine which sequences the A/D through its conversion steps to convert an analog input into a 4-bit b..
Titan has numerous hydrocarbon lakes containing a mix of methane and ethane in unknown proportions. A small submersible vehicle will exlpore Kraken Mare, the largest lake.
The axis of the cylinder is along the z axis, and the electrons are moving with a velocity vector v in the positive z direction. The velocity of the electrons is 0.1c where c is the speed of light (2.99792458 ´ 108 [m/s]). The magnitude of the cur..
(a) Design a high-pass filter with a cutoff frequency of 40 kHz. Use 0.01 uF capacitor and an appropriate resistor. B) Sketch and label the circuit. C) What is the gain of the filter at the cutoff frequency Give your answer both as ratio (Vout/Vin..
A control system is needed to control a small shopping center parking lot lighting system and the exterior lighting for the building. The design specifications require that the parking lot lighting and the exterior lighting turn on at dusk automat..
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