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Figure 13-34 shows the graph of the voltage across an inductance. The current changes from 4 A to 5 A during the time interval from 4 s to 5 s
a. What is L?
b. Determine the current waveform and plot it.
c. What is the current at t = 10 s?
Problem: A 50kW load operates from a 60 Hz 10 kV line with a power factor of 60% lagging. Determine the capacitance that must be placed in parallel with the load to achieve a 90% lagging power factor.
Suppose a radio frequency signal is sampled at fs = 500 MHz. What frequency bands from 250 MHz to 1000 MHz will alias into the FM band, 88-108 MHz
A parking meter accepts only quarters, which are worth one half hour each. A car may park at the meter for a maximum of 90 minutes; and the meter does not give change- quarters beyond 90 minutes are accepted, but don't increase the meter's count.
An adiabatic piston cylinder contains 1 kg of R-134a. Initially the conditions inside the piston are 200 kPa and 0 degrees C. An electric heater inside the device runs with constant voltage of 110 V and a constant 0.1A of current for one hour
Regulated DC Power Supply design problem. The students must choose the values of the following parameters for the design:VOut = 6.0 V or 10.0 V or 12.0 V RL = ?? ? and R1 = ?? ?
A positive charge q1 is located to the left of a negative charge -q2. On a line passing through the two charges, there are two places where the total potential is zero. The first place is between the charges and is 4.00 cm to the left of the negat..
Design a hardware implementation of a binary tree which functions as follows Each node of the binary tree has a unique address ( as discussed inclass). Given the address (A) of a node, and a datum (I), the machine willwrite I in node A.
Find also the area of the inlet pipe given that the specific volume of the gases at inlet is 0.5 m3/kg.
The speed of a 10HP, 230V, 1200 rpm separately excited DC motor is controlled by a 1-phase full-wave bridge converter. The rated armature current of the motor is 10 A. The armature resistance is 0.25 Ohm and the armature inductance is 10 mH.
A 3-phase motor has coils wchich can be configured in a Y load. If each load phase has an impedance of 8+j6 ohms determine the power taken by the motor when supplied by a balanced 3-phase voltage source of 440V line to line.
A three phasestar connected alternator with synchronous impedance of 1+j5 ohms per phase is connected to an 11kV system. The alternator power outputis found to be 10MW and reactive power output as 3MVAr.
Briefly explain which point on the Phillips curve graph best represents the same economic situation as point B on the aggregate demand and aggregate supply graph.
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