Description : What is the fundamental difference between the phase relationship of the harmonics of the square wave as compared to the harmonics of a peaked wave?
Last Answer : All the odd harmonics are in phase with the fundamental in the square wave. This is not true of the odd harmonics in the peaked wave.
Description : When the post-cardiac surgery patient demonstrates restlessness, nausea, weakness, and peaked T waves, the nurse reviews the patient's serum electrolytes anticipating which abnormality? a) Hyperkalemia ... likely be indicated by weakness, fatigue, and confusion without change in T wave formation
Last Answer : a) Hyperkalemia Hyperkalemia is indicated by mental confusion, restlessness, nausea, weakness, and dysrhythmias (tall, peaked T waves).
Description : Which of the following ECG characteristics is usually seen when a patient's serum potassium level is low? a) U wave The U wave is an ECG waveform characteristic that may ... interval The QT interval is an ECG characteristic reflecting the time from ventricular depolarization to repolarization.
Last Answer : a) U wave The U wave is an ECG waveform characteristic that may reflect Purkinje fiber repolarization. It is usually seen when a patient’s serum potassium level is low.
Description : Do you think we have peaked with our needs for cell phone tech ?
Last Answer : We have not peaked. The technology rush will continue.
Description : A constant centre (in plan-view) arch dam is best suited for: a) A V- shaped gorge b) A U- shaped gorge c) Both U- and V- shaped gorges d) multi- peaked gorges
Last Answer : a) A V- shaped gorge
Description : The magic-T is composed of what two basic types of T junctions?
Last Answer : E-type and H-type.
Description : What composite field (composed of E and H fields) is propagated into free space?
Last Answer : Radiation field.
Description : What composite field (composed of E and H fields) is found stored in the antenna?
Last Answer : Induction field.
Description : Which two composite fields (composed of E and H fields) are associated with every antenna?
Last Answer : Induction field and radiation field.
Description : A typical liquid-cooling system is composed of what loops?
Last Answer : Primary and secondary.
Description : Any system composed of one or more computers and terminals can be defined as what?
Last Answer : A network.
Last Answer : Wave winding is composed of that even number which is exact multiple of poles + 2.
Description : Which subscript, in circular waveguide classification, indicates the number of full-wave patterns around the circumference?
Last Answer : First.
Description : The number of half-wave patterns in the "b" dimension of rectangular waveguides is indicated by which of the two descriptive subscripts?
Last Answer : Second.
Description : What is added to a sawtooth generator to produce a trapezoidal wave?
Last Answer : A resistor.
Description : Can a pure sine wave be integrated? Why?
Last Answer : A pure sine wave cannot be integrated; it contains no harmonics.
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 negative damper with negative bias clamps the most positive extremity of the output wave shape to what polarity (positive or negative)?
Last Answer : Negative potential.
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 : A sound wave that is reflected back toward the source is known as what type of sound?
Last Answer : Echo.
Description : A refracted wave occurs when a wave passes from one medium into another medium. What determines the angle of refraction?
Last Answer : The density of the two mediums, and the velocity of the waves.
Description : When a wave is reflected from a surface, energy is transferred. When is the transfer of energy greatest?
Last Answer : When the incident wave is nearly parallel with the surface.
Description : What are the three requirements for a wave to be propagated?
Last Answer : A source, medium, and detector (receiver).
Description : What example of a longitudinal wave was given in the text?
Last Answer : A sound wave.
Description : What type of wave motion is represented by the motion of water?
Last Answer : Transverse waves.
Description : What are some examples of wave motion?
Last Answer : Sound waves, light waves, radio waves, heat waves, water waves.
Description : What is wave motion?
Last Answer : A means of transferring energy from one place to another.
Description : How is a wave defined as it applies to wave propagation?
Last Answer : A wave is a disturbance which moves through a medium
Description : In the inverting configuration, what is the voltage (for all practical purposes) at the inverting input to the operational amplifier if the input signal is a 1-volt, peak-to-peak sine wave?
Last Answer : 0 volts.
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 : If a half-wave rectifier is added to a half-wave voltage doubler, the resulting circuit is a voltage ___
Last Answer : Trippler.
Description : A half-wave voltage doubler is made up of how many half wave rectifiers?
Last Answer : Two.
Description : Is a full-wave rectifier output easier to filter than that of a half-wave rectifier?
Last Answer : Yes.
Description : What main advantage does a bridge rectifier have over a conventional full-wave rectifier?
Last Answer : The bridge rectifier can produce twice the voltage with the same size transformer.
Description : What is the main disadvantage of a conventional full-wave rectifier?
Last Answer : Peak voltage is half that of the half-wave rectifier.
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 : What is the ripple frequency of a full-wave rectifier with an input frequency of 60 Hz?
Last Answer : 120 hertz.
Description : What was the major factor that led to the development of the full-wave rectifier?
Last Answer : The fact that the full-wave rectifier uses the full output, both half cycles, of the transformer.
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 happens to the radio wave if the luf is too low?
Last Answer : When luf is too low it is absorbed and is too weak for reception.
Description : What is the skip zone of a radio wave?
Last Answer : A zone of silence between the ground wave and sky wave where there is no reception.
Description : What factor determines whether a radio wave is reflected or refracted by the ionosphere?
Last Answer : Thickness of ionized layer.
Description : What three factors must be considered in the transmission of a surface wave to reduce attenuation?
Last Answer : (a) electrical properties of the terrain (b) frequency (c) polarization of the antenna
Description : What is the best type of surface or terrain to use for radio wave transmission?
Last Answer : Radio horizon is about 1/3 farther.
Description : What is the determining factor in classifying whether a radio wave is a ground wave or a space wave?
Last Answer : Whether the component of the wave is travelling along the surface or over the surface of the earth.
Description : What is the term used to describe the basic frequency of a radio wave?
Last Answer : Fundamental frequency.
Description : What is the term used to describe a whole number multiple of the basic frequency of a radio wave?
Last Answer : Harmonic frequency or harmonics.
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