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1. What are the three main electrical test instruments used in troubleshooting?
2. What is the advantage of a plunger-type voltage tester?
3. A motor is tripping out on overload. The motor nameplate reveals a full-load current of 68 amperes. When the motor is operating under load, an ammeter indicates the following: phase 1 = 106 amperes, phase 2 = 104 amperes, and phase 3 = 105 amperes. What is the most likely problem with this motor?
The average intensity of sunlight reaching the earth is 1390W/m2. A charge of 2.38 x 10-8 C isplaced in the path of this electromagnetic wave. What is the magnitude of the maximum electric force that the charge experiences
Include a discussion of the importance of electrical isolation when interfacing microcontrollers to higher voltage inductive circuits (motors). Include detail of how electrical isolation can be achieved to protect the microcontroller and motor.
A substance expands from V1 = 1 ft3 to V2 = 6 ft3 in a constant-pressure process at 100 lbf/in2. The initial and final internal energies are U1 = 40 Btu and U2 = 20 Btu, respectively.
Determine the open-circuit voltage VL. - If the 2.2-kΩ resistor is short circuited, what is the new value of VL?- Determine VL if the 4.7-kΩ resistor is replaced by an open circuit.
Dtermine the resistancevalues for avoltage divider that must meet the following specifications. The currrent drain under the unload condition is nit to exceed 5mA. The soure voltage is to be 10V and 5V . Sketch the citcuit.
find the shortest length L of the line open-circuited at its load end so that the input impedance of the line at frequency f = 5GHz is the same as the impedance of a capacitor of capacitance C=10pf of the same frequency.
Scenario/Summary: At least two of the following simulations must be attempted by the student. Verify Loop Analysis Method by MultiSim simulation Verify Superpposition Theorem Method by MultiSim simulation
Originally, the voltage is zero over the entire length of the transmission line. At t = 0 the switch closes. Find the voltage waveforms at A and B
The name plate of a squirrel-cage four-pole induction motor has the following information: 25 hp, 220 volts, three-phase, 60 Hz, 830 rev/min, 64A line current.
To control echo, we can insert loss in a voice channel. How can loss be inserted on the digital side?
What are the main environmental impacts of energy generation and utilization?
If possible, compare your results to those obtained from a microwave CAD tool.
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