Class 12th Physics 2017 Set1 Delhi Board Paper Solution
For a CE transistor amplifier, the audio signal voltage across the collector resistance of 2 k⦠is 2V. Given, the current amplification factor of the transistor is 100, find the input signal voltage and base current, if the base resistance is 1 kâ¦.
Given Vce = 2V, Rc = 2k⦠, β = 100, R1 = 1kâ¦,
We need to find
iB and VB
ic = Collector current = Vce / Rc = 2V / 2k⦠= 2V / 2 x10-3⦠= 1 x 10-3 A = 1.0mA
iB = base current = ic / β = 1.0m A / 100 = 0.01m A
iB RB = Input signal voltage = (0.01 mA) (1kâ¦) = (0.01 x 10-3A) (1 x 103â¦) = 0.01V = 10mV
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