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Switching speed of P+ junction depends on _________(a) Mobility of minority carriers in P junction(b) Life time of minority carriers in P junction(c) Mobility of majority carriers in N junction(d) Life time of minority carriers in N junctionI have been asked this question during an internship interview.Question is taken from Transistor Switching Times topic in portion Transistor Characteristics of Electronic Devices & Circuits

Answer» RIGHT option is (d) Life time of minority carriers in N junction

Explanation: Switching leads to move holes in P region to N region as minority carriers. REMOVAL of this ACCUMULATION determines switching speed. P+ REGARDS to a diode in which the p type is doped EXCESSIVELY.


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