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Electronic Devices and Circuits - Engineering

Q1:

Assertion (A): In design of circuit using BJT, a derating factor is used. Reason (R): As the ambient temperature increases, heat dissipation becomes slower.

A Both A and R are true and R is correct explanation of A

B Both A and R are true but R is not a correct explanation of A

C A is true but R is false

D A is false but R is true

ANS:A - Both A and R are true and R is correct explanation of A

Increase of ambient temperature lowers the heat dissipation capacity. Therefore derated operation of BJT is necessary lest BJT should be destroyed.