Video Solutions for GATE 2012 EC : Analog Electronics - One Mark Questions

1.  The current i_b through the base of a silicon npn transistor is 1+0.1 cos(10000πt) mA. At 300 K, the r_π in the small signal model of the transistor is

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2. The Impedance looking into the nodes 1 and 2 in circuit given is 

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