What are the two leads of a semiconductor diode called, and how is one of them often marked?
- Anode and cathode; a stripe marks the anode
- Anode and cathode; a stripe marks the cathode
- Emitter and collector; a dot marks the emitter
- Source and drain; a tab marks the source
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B. Anode and cathode; a stripe marks the cathode
A diode has an anode and a cathode, and the band printed on the body identifies the cathode end. Emitter, collector, source and drain are transistor terminals.
Reference: Electronic components: diodes
Which three terminals belong to a bipolar junction transistor?
- Emitter, base and collector
- Source, gate and drain
- Anode, cathode and gate
- Primary, secondary and tap
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A. Emitter, base and collector
A bipolar transistor has an emitter, a base and a collector. Source, gate and drain are the terminals of a field-effect transistor, the tempting alternative.
Reference: Electronic components: transistors
Which component can use a small signal to control a much larger current, working as an amplifier or a switch?
- Capacitor
- Transformer
- Transistor
- Potentiometer
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C. Transistor
A transistor provides gain: a small input controls a larger output current. A transformer can raise voltage but cannot add power to a signal.
Reference: Electronic components: transistors