PDF Notes: module 5 bee

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    What is a half wave rectifier?

    It converts AC to DC using only one half of the input waveform.

    What is a full wave rectifier?

    It converts both halves of the AC waveform into DC.

    What defines a Zener diode?

    Operates in reverse bias to maintain a constant voltage.

    How does a Zener diode differ from a regular diode?

    Zener diodes are designed for reverse breakdown operation.

    What is the function of a Zener voltage regulator?

    Maintains a constant output voltage despite changes in load current.

    What happens when the load current increases in a Zener regulator?

    The current through the Zener diode decreases to keep output voltage constant.

    What is a transistor?

    A device made of two pn junctions that controls current flow.

    What are the two types of transistors?

    NPN and PNP transistors.

    What is the role of the emitter in a transistor?

    Supplies charge carriers to the base.

    What is the function of the collector in a transistor?

    Removes charges from the junction with the base.

    What is the base in a transistor?

    The middle section that forms two pn-junctions.

    What are the three regions of operation for a transistor?

    Active, cutoff, and saturation.

    What occurs in the active region of a transistor?

    Base-emitter junction is forward biased, allowing current flow.

    What characterizes the cutoff region in a transistor?

    Both junctions are reverse biased, resulting in minimal current.

    What happens in the saturation region of a transistor?

    Both junctions are forward biased, allowing maximum current.

    How does the emitter current relate to collector current?

    Collector current is nearly equal to emitter current.