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A 9.1 V zener diode exhibits its nominal voltage at a test current of 29 mA. At this current the incremental resistance is specified as 5 ?. The zener knee current is 1 mA. i. The zener knee voltag
Loop antennas are very common and are often used by amateur radio sites. In fact, the figure on the right is provided as an example what one may find when searching for loop antennas on the web.
A positron (same mass as electron) moving at .8c collides head on with a stationary electron producing two photons with EQUAL ANGLES relative to the incoming positron. Find the photon energies, wave
A 10 kVA transformer has an iron loss of 250 watts and a half-load copper loss of 80 watts. Determine the full-load efficiency at 0.8 power factor.
an electric kettle is required to heat 0.6 litre of water from 10 degrees celcius to boiling point in 5 minutes,the supply voltage being 240 volts. The efficiency of the kettle is 87%. Assume the sp
A perfect conductor with bias voltage Vo is insulated with a wedge shaped dielectric material of angle, =450, whose relative permittivity is εr. Use electrostatic boundary conditions to dete
Shunt capacitors are installed at the receiving end to improve the line performance. The line delivers 70 MVA, 0.8 lagging power factor at 64 kV. Determine the total Mvar and the capacitance per phas
Then, solve each Problem using hand calculations. A three-phase, 765-kV, 60-Hz transposed line is composed of four ACSR 1,431,000, 45/7 Bobolink conductors per phase with flat horizontal spacing of
The ABCD constants of a three-phase, 345-kV transmission line are A = D = 0:98182 + j0:0012447. The line delivers 400 MVA at 0.8 lagging power factor at 345 kV. Determine the sending end quantities,
A three-phase, 345-kV, 60-Hz transposed line is composed of two ACSR 1,113,000, 45/7 Bluejay conductors per phase with flat horizontal spacing of 11 m. The conductors have a diameter of 3.195 cm and
A Si pn junction diode is described by its I-V equation, I?= Is exp (V?/V?) ,where V?=25mV, Is=10-14A . It is desired to derive constant drop and PWL models for the diode assuming an operating curre
A three-phase, 318.75-kVA, 2300-V alternator has an armature resistance of 0.35 /phase and a synchronous reactance of 1.2 /phase. Determine the no-load line-to-line generated voltage and t
The voltage magnitude of source 2 and the phase angles of the two sources is to be kept constant. Compute the complex power for each source and the line loss. Tabulate the reactive powers and plot Q
The voltage of a resistor is calculate by the Ohm`s Law: V = R I. write a program that will input resistance R, current I for several resistors, and will calculate and display the voltage for each r
The failed machine will be immediately replaced with a brand new one upon the failure and the replacement time is negligible. Each machine will cost $100,000 dollars and the system is designed to ru
Two full charged 8A-Hr batteries are connected in parallel and supply power to a resistive load of 2.4 ohms. The open-circuit voltage of both batteries is 6.4VDC and the internal(Thevenin) resistanc
he potential field V = 2x^2yz-y^3x exist in a dielectric medium having ε=2ε0 . A) does v satify laplace's equation B) Calculate the total charge within the unit cube 0<x<1m<y&
If an excess of holes is introduced into the center describe in words (and what a sketch would look like) of the minority carrier distribution after a time roughly about equal to the minority carrie
1. Formulate the cost function in terms of autocorrelation values of the time sequence and filter weights 2. Derive Wiener-Hopf equations (in matrix form) 3. Determine the closed form solution for Wie
if a 2.000Å (.2nm) photon interacts with the bound electron in an hydrogen atom (binding energy 13.6 eV) with a Compton collision. The electron moves forward in the same direction as the incid
Determine the number of gates needed to implement a 4-bit carry-lookahead adder, assuming no fan-in constraints. Use AND, OR, and XOR gates with any number of inputs
When all the heavy machinery is operational, the total electric current flowing into the factory is 5.7 amperes. The phase angle between the voltage and current waveforms is measured to be 4.0 radia
A square pulse train (i.e. square wave) with low and high voltage values of VL= 0 and VH= 2.9 volts is applied to a DC voltmeter. The voltage measured by the instrument is 0.2 volts. The same signal
The dimmer knob is adjusted such that it applies voltage to the load during the initial 28 % of each half cycle of the standard 120V/60 Hz AC voltage. Find the real (average) power dissipated on the
A large number, n, of closely spaced turns of fine wire are wound in a single layer upon the surface of a plastic sphere of radius, R, with the planes of each turn perpendicular to the axis of the s