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Answer :

Yes BJT have second breakdown problem.
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Answer : No MOSFET do not have a second breakdown problem.

Answer : Yes BJT have internal capacitances.

Answer : Bipolar junction transistor

Description : Explain zener breakdown and avalanche breakdown.

Answer : The Zener Breakdown and Avalanche Breakdown are two different mechanisms by which a PN junction breaks. The Zener and Avalanche breakdown both occur in diode under reverse bias. The avalanche breakdown ... in the PN junction and causes breakdown. The process is known as the Avalanche breakdown.

Description : Define : (i) Dielectric strength (ii) Breakdown voltage

Answer : (i) Dielectric strength: The voltage which a dielectric material can withstand without breaking down (without losing its dielectric property) is called its dielectric strength. It is represented by kV/mm ... or is no longer an insulator) for a specified thickness, is its breakdown voltage.