Thursday, July 31, 2014

GATE 2012 ECE Video Solutions on Analog Circuits (Analog Electronics)

1. The current ib through the base of a silicon NPN transistor is 1+0.1cos (10000πt) mA. At 300oK, the rπ in the small signal model of the transistor is ________ (in Ohms).

a. 250
b. 27.5
c. 25
d. 22.5
Answer:C
Solution: https://www.youtube.com/watch?v=LvH15dfxkVE


2. The impedance looking into nodes 1 and 2 in the given circuit is________ (in Ohms).

a. 50
b. 100
c. 5K
d. 10.1 K
Answer:A
Solution: https://www.youtube.com/watch?v=M7px_ck8xa4


3. The circuit shown is a

Answer:B
Solution: https://www.youtube.com/watch?v=tr13sXmjwH4


4. The voltage gain Av, of the circuit shown below is

a. |Av| ≡ 200
b. |Av| ≡ 100
c. |Av| ≡ 20
d. |Av| ≡ 10
Answer:D
Solution: https://www.youtube.com/watch?v=u07jd8J7Sfw

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