Description : What type damper (with bias) clamps the most negative extremity of the output waveform to a negative potential?
Last Answer : Positive clamper with negative bias.
Description : What type of bias (positive or negative) is added to a negative damper for the most positive extremity of the wave shape to be clamped above 0 volts?
Last Answer : Positive bias.
Description : A positive damper clamps which extremity of the output signal to 0 volts?
Last Answer : Most negative.
Description : To which polarity does a positive damper with positive bins clamp the most negative extremity of the output waveform (positive or negative)?
Last Answer : Positive potential.
Description : A negative damper damps which extremity of the output waveshape to 0 volts?
Last Answer : Most positive.
Description : To properly bias an NPN transistor, what polarity voltage is applied to the collector, and what is its relationship to the base voltage?
Last Answer : Positive, more positive.
Description : What would be the output of a negative clamper with a bias potential of −5 volts and an input voltage swing from +50 to −50 volts?
Last Answer : -5 volts.
Description : In the illustration, the function generators will accept only a signal of a given polarity, if negative is used for ahead and positive for astern, moving the bridge reference in the direction ... cause a speed change until the output voltage exceeds the value of the lube oil pressure override
Last Answer : Answer: C
Description : A flue damper and a vent damper are two examples of _______ a. Combustion air positive shut off devices b. Combustion air negative shut off devices c. Both a. & b. d. None of the above
Last Answer : a. Combustion air positive shut off devices
Description : In the basic transistor amplifier discussed earlier, what is the relationship between the polarity of the input and output signals?
Last Answer : The signals are opposite in polarity or 180 degrees out of phase with each other.
Description : Which portion of a sine-wave input is retained in the output of a series-negative limiter?
Last Answer : Positive.
Description : Which portion of a sine-wave input is retained in the output of a series-positive limiter?
Last Answer : Negative.
Description : If a voltage (positive or negative) is measured on the "1" output of a flip-flop, what state is it in?
Last Answer : SET state.
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 : How does dc bias added to the input signal correct the distortion in the output signal?
Last Answer : The dc bias moves the input signal away from the step in the magnetism curve. This prevents the input signal from crossing the zero-point of the magnetism curve.
Description : If a 6 volt battery were connected in series with a 24 volt battery by putting their negative terminals together, what would be the result? A. 'Zero' volts B. 12 volts of the opposite polarity C. 18 volts, positive on the 24 volt battery D. 30 volts, negative on the 24 volt battery
Description : What is the polarity of voltage at point 'Z' in the circuit shown in the illustration? EL-0085 A. It will always be positive. B. It will always be negative. C. It depends on the instantaneous polarity at point 'W'. D. It cannot be determined without a voltmeter.
Last Answer : Answer: A
Description : While troubleshooting a circuit in an engine room central control console, a resistor is suspected of being faulty. Which of the following precautions must be observed if an ohmmeter is to be used to ... of the component isolated. D. The meter case must be grounded prior to attaching the leads.
Description : If the electricity represented by the wave form in 'B' were applied to the left side of the illustrated circuit, the output on the right side would be ____________. EL-0064 A. direct current with the ... lower lead D. clipped to a value equal to the square root of 3 times the input voltage value
Description : What is the relative length of the discharge time constant with respect to the charge time constant of a damper (long or short)?
Last Answer : Long time constant.
Description : What is the relative length of the time constant for the diode capacitor combination in a damper (long or short)?
Last Answer : Short time constant.
Description : What is the relationship between the polarity of the voltage applied to the PNP transistor and that applied to the NPN transistor?
Last Answer : The polarity of voltage applied to the PNP transistor is opposite of that applied to the NPN
Description : What is the polarity of the first alternation of the tank circuit in an emitter-loaded npn pulsed oscillator?
Last Answer : Negative
Description : Using Weber’s molecular theory of magnetism, describe the polarity of the magnetic poles produced by stroking a magnetic material from right to left with the south pole of a magnet.
Last Answer : South pole at the right, north pole at the left.
Description : Before a diode will conduct, the cathode must be what polarity relative
Description : If logic 1 = -5 vdc and logic 0 = 0 vdc, what logic polarity is being used?
Description : If logic 1 = +2 vdc and logic 0 = -2 vdc, what logic polarity is being used?
Description : If logic 1 = -5 vdc and logic 0 = -10 vdc, what logic polarity is being used?
Description : In applying Kirchhoff’s current law, what does the polarity of the current indicate?
Last Answer : Whether the current is entering the junction (+) or leaving the junction (-).
Description : What is the polarity of the currents that feed the V antenna?
Last Answer : Opposite.
Description : In a full-wave voltage doubler, are the capacitors connected in series or in parallel with the output load?
Last Answer : In parallel.
Description : Is a full-wave rectifier output easier to filter than that of a half-wave rectifier?
Last Answer : Yes.
Description : What is the average voltage (Eavg) Output of a full-wave rectifier with an output of 100 volts peak?
Last Answer : 63.7 volts.
Description : If the output of a half-wave rectifier is 50-volts peak, what is the average voltage
Last Answer : 15.9 volts.
Description : What is the output of a half-wave rectifier?
Last Answer : A pulsating dc voltage.
Description : What characteristic is determined by the time required for a voltage wave to travel from the input end of an artificial transmission line to the output end and back again?
Last Answer : Pulse width
Last Answer : Pulse width.
Description : What is the average voltage (Eavg) output of a full-wave rectifier that has an output of 100 volts peak?
Last Answer : 63.6 volts.
Description : What are the two classifications of wave generators according to their output waveshapes?
Last Answer : Sinusoidal and nonsinusoidal.
Description : How can a series-positive limiter be modified to limit unwanted negative portions of the input signal?
Last Answer : Biasing.
Description : Does a rectifier tube conduct on the positive or negative alternation of the input signal?
Description : If the load requirement consists of both positive and negative voltages, what technique is used in the voltage divider to supply the loads from a single voltage source?
Last Answer : The ground (reference point) is placed in the proper point in the voltage divider so that positive and negative voltages are supplied
Description : Which digital data encoding method records a digital one as a positive pulse and a digital (zero) as a negative pulse and returns the tape to neutral between pulses?
Last Answer : Return-to-zero (RZ) encoding.
Description : An electron moves into the electrostatic field between a positive charge and a negative charge. Toward which charge will the electron move?
Last Answer : Toward the positive charge.
Description : How do electrons get from the negative electrode to the positive electrode?
Last Answer : By current flow through the load.
Description : What is another name for the (a) positive electrode, and the (b) negative electrode?
Last Answer : a) The anode, (b) the cathode.
Description : What type of bias is used where only moderate changes in ambient temperature are expected?
Last Answer : Self-bias.