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Question

Physics Question on Current electricity

In the following common emitter circuit, if β = 100, VCE = 7V, VBE = Negligible and RC = 2 kΩ, then IB is equal to

A

(A) 0.01 mA

B

(B) 0.04 mA

C

(C) 0.02 mA

D

(D) 0.03 mA

Answer

(B) 0.04 mA

Explanation

Solution

Explanation:
Considering the output circuit, we haveVCC=iCRC+VCEiCRC=15−7=8VHence, iC=8RC=82×103=4mAiB=ICβ=4×10−3100=0.04m.A