An unknown transistor needs to be identified as a n − p − n or p − n − p type. A multimeter, with +ve and -ve terminals, is used to measure resistance between different terminals of transistor. If terminal 2 is the base of the transistor then which of the following is correct for a p − n − p transistor?

Question

An unknown transistor needs to be identified as a n − p − n or p − n − p type. A multimeter, with +ve and -ve terminals, is used to measure resistance between different terminals of transistor. If terminal 2 is the base of the transistor then which of the following is correct for a p − n − p transistor?, + ve terminal 2 , -ve terminal 3 , resistance low, +ve terminal 2 , -ve terminal 1 , resistance high, +ve terminal 1 , − ve terminal 2 , resistance high, +ve terminal 3 , − ve terminal 2 , resistance high

MARKS App · Accepted Answer

p − n − p transistor : Positive at terminal 2 and negative at terminal 1 implies p − n junction is reverse biased and hence offers high resistance.

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