The SCR is a __________.
Answer(s): A
The SCR is a special type of rectifier. It is used in control circuits. The name SCR was a descriptive one given it by General Electric Company engineers and it caught on in the literature. Its correct name is not silicon- controlled rectifier but thyristor.
In an FM receiver the AFC is __________.
Answer(s): B
On an FM receiver the AFC is automatic frequency control. It keeps the receiver from drifting from the station it is tuned to. This is done by having part of the signal fed back to the local oscillator to keep it operating on the correct frequency and not drifting.
The symbol above represents a __________.
The symbol shown represents a resistor.
The FM band covers __________.
The FM band covers 88 to 108 MHz. The AM band covers 550 to 1600 kilohertz.
The two most commonly used metals in solder are __________.
Typical solders are almost equal parts tin and lead.
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