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A n-p-n transistor is connected in common emitter configuration (see figure) in which collector voltage drop across load resistance (800 $\Omega$) connected to the collector circuit is 0.8 V. The collector current is

(1) 0.2 mA 

(2) 2 mA 

(3) 0.1 mA 

(4) 1 mA

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Ans: (4) 1 mA

Sol. Voltage drop across load resistance, 

VL = ICRC 

0.8 = IC × 800 

IC = 1 mA

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