Description : What is the term for the opposition that a capacitor presents to ac?
Last Answer : Capacitive reactance.
Description : What is the term for the opposition an inductor presents to ac?
Last Answer : Inductive reactance.
Description : Which of the following statements concerning AC circuits is correct? A. The power factor of a resistive circuit is always zero. B. True power in an inductive circuit always equals apparent power. ... . D. Total opposition to the flow of alternating current depends upon the amount of reactive power.
Last Answer : Answer: C
Description : What is the opposition to current flow in an AC circuit caused by an inductor called?
Last Answer : Need answer
Description : What effect does an increase in capacitance have on a capacitor’s opposition to current flow?
Last Answer : Opposition to current flow decreases.
Description : What is the formula used to compute the value of this opposition?
Last Answer : XL = 2πfL.
Description : What term identifies a single resistor that represents total resistance of a complex circuit?
Last Answer : Equivalent resistor or Req.
Description : What is the difference between calculating impedance in a series ac circuit and in a parallel ac circuit?
Last Answer : In a series circuit impedance is calculated from the values of resistance and reactance. In a parallel circuit, the values of resistive current and reactive current must be used to calculate total impedance.
Description : What is the reactive power in an ac circuit?
Last Answer : Reactive power is the power returned to the source by the reactive components of the circuit.
Description : What is the true power in an ac circuit?
Last Answer : True power is the power dissipated in the resistance of the circuit or the power actually used in the circuit.
Description : What is the value of Z in a series ac circuit where XL = 6ohms, XC = 3ohms, and R = 4ohms?
Last Answer : X = XL – XC or X = XC - XL
Description : The opposition to the establishment of magnetic lines of force in a magnetic circuit is called the circuit's _______. A. resistance B. reluctance C. impedance D. inductance
Last Answer : Answer: B
Description : The use of four diodes, in a full-wave bridge rectifier circuit, will __________. A. provide unidirectional current to the load B. allow a very high leakage current from the load C. convert direct current to alternating current D. offer high opposition to current in two directions
Last Answer : Answer: A
Description : In order to be recognised as an official opposition group in the Parliament- (1) 1/3rd of the total strength (2) 1/4th of the total strength (3) 1/6th of the total strength (4) 1/10th of the total strength
Last Answer : (4) 1/10th of the total strength Explanation: Officially opposition group in the parliament required
Description : What is the total number of members for the main opposition party in parliament
Last Answer : 1/10 of total members
Description : With reference to the conduct of government business in the Parliament of India, the term 'closure' refers to - (1) suspension of debate at the terminatan of a day's sitting of the Parliament ... session (4) refusal on the part of tie Government to have the opposition look at important documents
Last Answer : (1) suspension of debate at the terminatan of a day's sitting of the Parliament Explanation: "Closure" is one of the means by which a debate may be brought to a close by a majority decision of the FIouse, even though all members wishing to speak have not done so.
Description : What is the formula for determining total reactance in a series circuit where the values of XC and XL are known?
Description : What is the effect on total resistance and total current in a circuit if a short occurs in (a) a parallel branch, and (b) in a series portion?
Last Answer : (a) Total resistance decreases, total current increases (b) Total resistance decreases, total current increases
Description : What is the effect on total resistance and total current in a circuit if an open occurs in (a) a parallel branch, and (b) in a series portion?
Last Answer : (a) Total resistance increases, total current decreases (b) Total resistance becomes infinite, total current is equal to zero
Description : What is the total resistance of the circuit shown in figure 3- 60?
Last Answer : 25Ω
Description : What is the total resistance of the circuit shown in figure 3- 59? (Hint: Redraw the circuit to simplify and then use equivalent resistances to compute for RT.)
Last Answer : 4Ω
Description : Refer to figure 3-55(A). If the following resistors were replaced with the values indicated: R1 = 900Ω, R3 = 1kΩ, what is the total power in the circuit? What is ER2?
Last Answer : PT = 60 W, ER2 = 10 V.
Description : A series circuit consists of two resistors in series. R1 = 25 ohms and R2 = 30 ohms. The circuit current is 6 amps. What is the (a) source voltage, (b) voltage dropped by each resistor, (c) total power, and (d) power used by each resistor?
Last Answer : (a) 330 volts. (b) E1 = 150 volts. E2 = 180 volts. (c) 1.98 kilowatts. (d) P1 = 900 watts. P2 = 1.08 kilowatts component but in a parallel circuit total current divides among the available paths.
Description : There is a relationship between total current and current through the individual components in a circuit. What is this relationship in a series circuit and a parallel circuit?
Last Answer : The source voltage would have to be increased to 640 volts
Description : A series circuit consisting of three resistors has a current of 3 amps. If R1 = 20 ohms, R2= 60 ohms, and R 3 = 80 ohms, what is the (a) total resistance and (b) source voltage of the circuit?
Last Answer : (a) 160 ohms. (b) 480 ohms
Description : If Eeff is 130 volts and Ieff is 3 amperes, what is the total resistance (RT) in the circuit?
Last Answer : 43.3 ohms.
Description : What term is used to describe the frequency at which the filter circuit changes from the point of rejecting the unwanted frequencies to the point of passing the desired frequencies?
Last Answer : Frequency cutoff (fco).
Description : What is the term for the number of times per second that tank circuit energy is either stored in the inductor or capacitor?
Last Answer : Natural frequency or resonant frequency (f r).
Description : In an a.c. circuit that contains both an inductor and a capacitor, what term is used for the difference between the individual reactances?
Last Answer : Resultant reactance.
Description : What term is used to identify the procedure of connecting one side of a circuit board with the other?
Last Answer : Interfacial connections.
Description : a. Define the term "working voltage" of a capacitor. b. What should be the working voltage of a capacitor in a circuit that is operating at 600 volts?
Last Answer : a. It is the maximum voltage the capacitor can work without risk of damage. b. 900 volts.
Description : The combined effect of inductive reactance, capacitive reactance, and resistance in an AC series circuit is known as _____________. A. reactance B. total reactance C. impedance D. resonance
Description : In AC Circuit Theory, the term that replaces the resistance is: w) inductance x) capacitance y) impedance z) reactance
Last Answer : ANSWER: Y -- IMPEDANCE
Description : What name is given to a resistor used to replace the normal load in a circuit?
Last Answer : Dummy load or dummy antenna.
Description : What is the name given to the "picture" of a circuit such as the one shown in figure 3-2?
Last Answer : A schematic diagram.
Description : If an ac voltmeter is connected between the S2 and S3 windings on a TX, at what two rotor positions should the voltmeter read maximum voltage?
Last Answer : . 150º and 330º
Description : What leads in a simple synchro system are connected to the ac power line?
Last Answer : The rotor leads.
Description : When used for ac current control, during which alternation of the ac cycle does the TRIAC control current flow?
Last Answer : During both alternations.
Description : What is the basic difference between the primaries of ac and dc rate generators?
Last Answer : The method of primary excitation (ac and permanent magnet).
Description : In the output of an ac error detector, what indicates the (a) direction and (b) amount of control necessary for correspondence?
Last Answer : (a) Phase. (b) Amplitude.
Description : Most shipboard distribution systems use ac power that has what number of phases?
Last Answer : Three.
Description : What are the electrons called that give up energy to the ac field in a magnetron?
Last Answer : Working electrons.
Description : Why does using ac vice dc bias voltage result in a stronger output signal?
Last Answer : Because an ac bias voltage of the proper frequency and level places the input signal away from both steps in the magnetism curve. The result is two undistorted output signals that are combined into one strong output.
Description : What are three advantages of adding an ac bias voltage to the input signal instead of adding a fixed dc bias voltage?
Last Answer : a. Reproduces a stronger output signal. b. Greatly improves the SNR. c. Greatly reduces the natural tape hiss.
Description : Why does adding dc vice ac bias voltage to the input signal result in a poor signal-to-noise ratio (SNR)?
Last Answer : With dc bias, the SNR is poor because only a small portion of the magnetism curve is straight enough to use, thus the output signal is weak compared with the natural tape hiss.
Description : rid-leak biasing in effect rectifies the input ac signal. What feature
Last Answer : Unequal charge and discharge paths of the coupling capacitor Cc.
Description : If the mu of a tube is 85 and the signal at the control grid is 4 volts ac, the plate voltage will vary by what amount?
Last Answer : 340 volts.
Description : The plate voltage of a tube will vary 126 volts when a 3-volt ac signal is applied to the control grid. What is the gain of this tube?
Last Answer : 42.
Description : An ac voltage is applied across a diode. The tube will conduct when
Last Answer : Positive.
Description : What component causes a generator to produce dc voltage rather than ac voltage at its output terminals?
Last Answer : A commutator