A working transistor with its three legs marked , P Q and R is tested using a multimeter . No conduction is found between P and Q . By connecting the common (negative ) terminal of the multimeter to R and the other (positive) terminal to P or Q. some resistance is seen on the multimeter. Which of the following is true for the transistor ?

A working transistor with its three legs marked , P Q and R is tested

1.	A working transistor with its three legs marked , P Q and R is tested using a multimeter . No conduction is found between P and Q . By connecting the common (negative ) terminal of the multimeter to R and the other (positive) terminal to P or Q. some resistance is seen on the multimeter. Which of the following is true for the transistor ?
Answer» It is an npn TRANSISTOR with R as collector . It is an npn transistor with R as base. It is a pnp transistor with R as collector . It is a pnp transistor with R as emitter. Solution :Since there no CONDUCTION is found between P and so P and Q are EITHER both p - type or both n - type and P and Q are emitter and collector of transistor . When R is connected to the terminal and P or Q to positive terminal of multimeter then emitter base JUNCTION will conduct being forward biased or reverse biased. `:.` It is npn transistor with R as base.

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