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What is the use of diode in the circuit?

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What is the use of diode in the circuit?

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Diode is a device which allows the flow of current in one direction and blocks the current in opposite direction.
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A zener voltage regulator has load requirements of 12 V and 2 A. The zener diode minimum current requirement is 0.2 A. The minimum voltage at input is 24 V. What is the required value of series resistance with source? A) 5.45 Ω B) 6 Ω C) 7.2 Ω D) 6.38 Ω  

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Which diode exhibits negative resistance characteristic?
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Which diode exhibits negative resistance characteristic? (A) LED (B) Zener (C) Tunnel diode (D) PN diode

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Which diode exhibits negative resistance characteristic? (A) LED (B) Zener (C) Tunnel diode (D) PN diode

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How can you identify a zener diode?

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It  conducts  current  in  either  direction.

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How do we test a diode?

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Justify the statement. Antiparallel diode is connected across MOSFET.

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