JEE Main 20169 AprilOnline
- Exam
- JEE Main
- Year
- 2016
- Date
- 9 April
- Mode
- Online
- Subject
- Physics
- Chapter
- Semiconductors
JEE Main 2016 · 9 April · Online · Physics · Semiconductors
An unknown transistor needs to be identified as a npn or pnp type....
An unknown transistor needs to be identified as a or 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 transistor?
Options
- A+ve terminal 2, -ve terminal 3, resistance low
- B+ve terminal 2, -ve terminal 1, resistance high
- C+ve terminal 1, -ve terminal 2, resistance high
- D+ve terminal 3, -ve terminal 2, resistance high
Correct answer
B. +ve terminal 2, -ve terminal 1, resistance high
Step-by-step solution
When pn junction is forward biased resistance is low. When pn junction reverse biased resistance is high. Because of this reason, we can amplify currents.
For this reason, Transistors can be used as:-
- An amplifier
- A switch
- Logic gates