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1. For the following transistor switching circuit:
a) Determine the value of VCE when VIN = 0V.
b) Determine the minimum value of IB required to saturate the transistor if β is 125 and VCE(sat) is 0.2V.
c) Calculate the maximum value of RB when VIN = 5V. (Assume VBE = 0.7V)
2. A NPN transistor is connected as shown with R1 = 6.8 kΩ, R2 = 1 kΩ, RC = 3.3 k
Ω, RE = 1 kΩ and VCC = 15V. Assume VBE = 0.7V.
a) Compute VCE and IC for (i) β = 100 and ii) β = 300
b) Comment on the variation of VCE and IC calculated in part (a) for two different values of β
