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The load draws 1.2 pu current at 0.6 puvoltage while drawing 0.5 pu (true) power. If the base volageis 20 kV and the base current is 160 A, calculate the power factor and the ohmic value of the resi
A wattmeter connected to a 240-volt 60 Hz series RL circuitindicates a reading of 691 watts. A clamp-on ammeter used to measure current flow indicates a current of 4.8 A.
Assuming unity power factor, determine the full load currentsin the primary and secondary windings At full load, determine the power losses in the primarysecondary resistances. If the input power to t
a fully loaded 100 hp induction motor operates at 85% efficiencyfrom a 450 v line.if the power factor is 0.65 lagging.what currentdoes that the motor drawn. if the power factor is 0.9 lagginginstead
Many automobiles are equipped with windshield wipers that can operate intermittently during a light rainfall. How does the operation ofsuch wipers depend on the charging and discharging of a capacit
lets suppose there are two capacitors of same capacitance and they are connected separately to there own battries now we joined both the capacitors togathers and are connectd to the battery with wir
A step-down transformer has a120V rms primary voltage applied and a 12V rms voltage is measuredat the secondary. Assuming the transformer can be considered ideal, determine the turns ratio, n.
Two wires - A and B - with circular cross-sections have identical lengths and are made of the same material. Yet, wire A has four times the resistance of wire B. How many times greater is the diamet
A parallel-plate capacitor is charged by a battery, and the battery is then disconnected from the capacitor. Because the charges on the capacitor plates are opposite in sign,they attract each other.
How should three capacitors and two batteries be connected so that the capacitors will store the maximum possible energy
Given that the required transmission time for a block of data of length 64kilobits to be transmitted error-free is 6 seconds and that the receiver has a bandwidth of 20kHz, what is required SNR of t
An two engine plan is capable of flying as long as one engine isrunning. Let the right and left engines be X and Y random variables that are independent. Denote the densities for Xand Y as fX and fY
An AC voltage of 240 volts at frequency of 60 Hz is applied to a 50- μF capactor. Determine the amount of AC current flow in the circuit.
An AC voltage of 240 volts with frequency of 60 Hz is applied to 0.5-H inductor. Assuming that the inductor was pure of ideal (no resistance; inductive reactance only), how much current would flow
Assume a thermocouple generates a linear voltage from 20 mV to 50 mV when the temperature changes from 750 degrees F to 1250 degrees F. How much voltage will be generated when the temperature of the
Suppose a uniform magnetic field exists ina finite regionof space. Can a charged particle be injected into this region from the outside and remain trapped in the region by magnetic force alone
In a lightning strike there is a rapid movement of negative charge from a cloud to the ground. In what direction is a lightning strike deflected by Earth's magnetic field
A solar pond consists of a thin layer of fresh water floating ontop of a denser later of salt water. When the salty layer absorbssun light, it becomes hot, to 140 degrees C. The ambient temp isassum
A 100-μF capacitor is initially charged to 100V. We want 90 percent of the internal energy to remain after one minute. What is the limit on the leakage resitance for the capacitor.
Assume a 10w power is transmitted over an area with a radius of 10m. Determine power density attenuation (Lρ) and electric field strenght attenuation in dB when received power is reduced to 1/10
A)What is the standard frequency of the AC voltage generatedand distributed by an electrical utility. B)Explain the function of the prime mover in the generating process.
What peak value of AC current is required to produce the same amount of heat B) What rms, or effected value, of AC current is requiredto produce the same amount heat
The line voltage and current delivered to a balanced 3-phase Wye- connected resistive load bank is measured and found tobe 415 V and 30 A respectively. 1) What is the value of voltage across on phas
1 - Sketch the signal. 2- Determine if the signal is even, odd, or neither even nor odd. 3- Evaluate and sketch the even and odd components of the signal.
Resistors R1 -8 Ω, R2 -4 Ω and R3 -6 Ω, are connected in series to a voltage source. Which resistor will dissipate the most power