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Problem 1: An unbalanced 3-phase load consisting of:
ZA = 5kW at a lagging power factor of 0.7
ZB = 6kW at a lagging power factor of 0.9
And ZC = 8kW at a lagging power factor of 0.8
Is connected in star configuration to a 3-phase, 4 wire 450v supply.
a. Calculate the magnitude and phase angles of the phase voltages at the load.
b. Calculate the magnitude and phase angles of the 3 line currents.
c. Calculate the magnitudes and phase angle of the current in the neutral wire.
d. Calculate the total reactive power in the load.
e. State what will happen if the neutral wire becomes open-circuited?
A computer has a 32-bit instruction word broken into fields as follows: opcode, six bits; two register fields, five bits each; and one immediate operand/register field, 16 bits (a) What is the maximum number of operations that can be specified
A 22000 V, 60 Hz generator is connected to the high voltage side of a 22000-2200V, 500 kVA step down transformer. If the resultant core flux is 0.0683 Wb (max), determine: A) the number of turns of wire in the secondary coil.
A small object with charge Q1=6nC is located at the origin. A second small object with charge Q2=-5nC is located at m. What is the net electric field at location A m due to Q1 and Q2
1) Calculate w in radians per second for each of the following: a. f = 30 Hz b. Period = 20 ms 2) Determine the rms values for each of the following: a. v = 100 sin wt V b. i = 8 sin 377t A
Racecar A is traveling on a straight portion of the track while racecar B is traveling on a circular portion of the track. At the instant shown, the speed of A is increasing at the rate of 10 m/s2, and the speed of B is decreasing at the rate of 6..
Calculate the approximate quantization S/N ratio in the baseband audio signal at the receiver output (after the DAC and LPF).
the electric field in free space outside a conducting sphere of raduis a and centered at the origin resulting from an applied field is given by E=E0(1+2a^3/r^3)cosθir -E0(1-a^3/r^3)sinθiθ show that the tangentail component of E is zero on the cond..
A series circuit with R =2 ohm, L = 2 mH, and C =500 mF has a current which increases linearly from zero to 10A in the interval 0
The bellows, diaphragm, and Bourdon tube pressure sensors all exhibit second order time response. This means that a sudden change in pressure will cause an oscillation in the displacement and, therefore in the sensor output.
Find its unit step response when the ICs are y[-2] = 2 and y[-1] = 1. Be sure to identify the three parts of the solution: zero-input, transient zero-state, and steady-state zero-state.
A somewhat discharged automotive battery has an open-curcuit voltage of 12.5 V and supplies 50 A when a 0.1 ohm resistance is connected across the battery terminals. find the thevenin equivalent voltage
Figure 1 shows the network diagram of a 132kV power system. The network has three buses and two generating units. The loads of (l.O+jO.35) pu and (3.2+J1.2) pu are connected at bus 2 and 3 respectively. The generator connected at bus 2 injects 1.2..
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