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A permanent-magnet automotive fan motor draws 20 A from a 12-V source when the rotor is locked (i.e., held motionless).
a. Find the armature resistance.
b. Find the maximum developed power that this motor can produce when operated from a 12-V source.
c. Repeat part (b) for operation at 10V (this represents a nearly dead battery) and at 14V (this is the terminal voltage during charging of the battery after the engine is started).
use as few 3times8 binary-decimal decoders and 3-input nor gates as possible to implement a bcd squaring circuit.
A potentiometer is wired to represent a range of 0 - 180 degrees. The potentiometer is supplied with a voltage of 15 Vdc. What is the output voltage at 75 degrees
An industrial assembly hall is continuously lighted by one hundred 40- W mercury vapor lamps supplied by a 120- V and 60- Hz source with a power factor of 0.65. Due to the low power factor, a 25 percent penalty is applied at billing.
A N-turn resonant circular loop with a uniform current distribution and with a circumference of f/4 , is fed by a lossless balanced twin-lead transmission line with a characteristic impedance of 300 ohms. Neglecting proximity effects
Sketch the phasor diagrams for the following waveforms: v1 = 80sin(pi*t + 35°)(a) What is the phase difference between v1 and v2 (b) Determine which voltage leads and which lags.
Consider the circuit shown in Figure.The circuit has been operating for a long time with the switch closed prior to t = 0. Determine the values of iL, i1, i2, i3, and vC just before the switch opens.
A 3 phase 50hz star connected motor has rotor resistance and stand still reactance of 0.025ohm and 0.35 ohm respectively. The full load slip is 5% calculate the resistance per phase of a star connected rheostat
how could an oscilloscope be used to display current waveforms instead of voltage waveforms. what constraints apply to your current measuring method.
How Automatic UPS system wiring circuit diagram for Home or Office works in both cases when the supply is available and when its not .
A PN flip-flop has four operations, clear to 0, no change,complement, and set to 1, when inputs P and N are 00, 01, 10, and11, respectively. (a) Tabulate the characteristic table. (b) Derive the characteristic equation.
Use the Z-transform of u[n] and properties of the Z-transform to find X(z). Verify that the expressions obtained above for X(z) are identical. Find the poles and the zeros of X(z) and plot them in the z-plan. Use MATLAB to plot the poles and zero..
AC Circit analysis and max power transfer, If the output impedance of a certain driving circuit is 50 Ohm - j10 Ohm, what value of load impedance will result in the maximum power to the load?
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