T6D-2014: Component functions: rectification; switches; indicators; power supply components; resonant circuit; shielding; power transformers; integrated circuits
Which of the following devices or circuits changes an alternating current into a varying direct current signal?
What best describes a relay?
A switch controlled by an electromagnet
A current controlled amplifier
An optical sensor
A pass transistor
What type of switch is represented by component 3 in figure T2?
Which of the following can be used to display signal strength on a numeric scale?
What type of circuit controls the amount of voltage from a power supply?
What component is commonly used to change 120V AC house current to a lower AC voltage for other uses?
Which of the following is commonly used as a visual indicator?
Which of the following is used together with an inductor to make a tuned circuit?
What is the name of a device that combines several semiconductors and other components into one package?
What is the function of component 2 in Figure T1?
Control the flow of current
Give off light when current flows through it
Supply electrical energy
Convert electrical energy into radio waves
What is a simple resonant or tuned circuit?
An inductor and a capacitor connected in series or parallel to form a filter
A type of voltage regulator
A resistor circuit used for reducing standing wave ratio
A circuit designed to provide high fidelity audio
Which of the following is a common reason to use shielded wire?
To prevent coupling of unwanted signals to or from the wire
To decrease the resistance of DC power connections
To increase the current carrying capability of the wire
To couple the wire to other signals
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