Reactance Study guides, Class notes & Summaries

In capacitors, what is the purpose of the dielectric? - ANSWER-Prevent arcing within the capacitor Which of the following is true about capacitors in AC circuits? - ANSWER-Current leads voltage all the time What describes a capacitor s ability to store an electrical charge? - ANSWER-Capacitance which of the following statements is correct about polarized electrolytic capacitors? - ANSWER-Voltage polarity must be correct What is the time constant for a circuit with 150k ohms and 2 mic...

Level 2 Module 1 Alternating Currents 2:1 What is the step-down turns ratio of a transformer with 200 turns in the primary and 100 turns in the secondary? induced high voltage Opening the secondary of a CT under load will cause a dangerous level of___. 40Hz What is the hertz rating of an AC circuit if the frequency is 20 cycles per 1/2 second? 340V Given: A circuit has an rms voltage of 120VAC. What is the peak-to-peak voltage? 175V A circuit has a peak voltage of 275V....

An AC circuit consists only of a pure inductance and a power source. The relationship between the voltage and the current in this circuit is that the correct answer: current lags the voltage The power factor of a load is equal to the ____________ power divided by the ____________ power. correct answer: True ; apparent A 10-ohms and 20-ohms resistor are connected in parallel. The total line current drawn by this parallel combination is 30 amps. Under these conditions, the line voltage wil...

Contains summaries of all mandatory reading materials for the class Resistance and Persuasion, given in the master classes of Information and Communication Sciences.

An AC circuit consists only of a pure inductance and a power source. The relationship between the voltage and the current in this circuit is that the Correct Answer current lags the voltage The power factor of a load is equal to the ____________ power divided by the ____________ power. Correct Answer True ; apparent A 10-ohms and 20-ohms resistor are connected in parallel. The total line current drawn by this parallel combination is 30 amps. Under these conditions, the line voltage will be...

Summary of all lectures with notes, and also the abstract and conclusion of all the articles are included (Netherlands).

When using a dynamic schedule and the energy profile in an hour is >250 MW and the actual hourly integration deviates from the hourly energy profile by ____ the tag must be modified. A. 100 MW B. 10% C. 50 MW D. 25% B. 10% Dry steam plants, flash steam plants, and binary cycle power plants are the three main types of what kind of generating plant? A. Nuclear generators B. Combustion turbine generators C. Geothermal generators D. Hydroelectric generators C. Geothermal generators...

The working voltage of a capacitor in an AC circuit should be CORRECT ANSWER at least 50 percent greater than the highest applied voltage The term that describes the combinded resistive forces in an AC circuit is CORRECT ANSWER impedance What is the opposition to the flow of AC produced by a magnetif field with generated back voltage (EMF) called? CORRECT ANSWER Inductive reactance Electrostatic fields are known as CORRECT ANSWER electrostatic fields The basis for transformer operati...

Attenuation Correct Answer-The Decrease in magnitude or power loss of a signal. Decibels, dB Correct Answer-Unit of measurement for attenuation. American Wire Gauge (AWG) Correct Answer-The numerical system for designating wire diameter. inverse relationship Correct Answer-American Wire Gauge numbers have this relationship to the wire size. Balanced Twisted-Pair Correct Answer-Type of wiring in which 2 conductors of a single circuit are twisted together in order to minimize EMI V=...

When current in an AC circuit is doubled, power losses in the circuit will respond in which way? a) half as much b) does not change c) doubles d) four times greater -Answer d) four times greater What determines the size of insulators used on power lines? a) Current flow on the line b) Voltage level of the line c) Reactance of the line d) Operating Limit of the line -Answer b) Voltage level of the line Reactive power is needed to support which type of load? a) Inductive b) Capacitive ...