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Given that IB = 5mA and hfe = 55, find load current.

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Given that IB = 5mA and hfe = 55, find load current.

(a) 28mA

(b) 280mA

(c) 2.5A

(d) 2A

I have been asked this question during an interview.

Origin of the question is Hybrid Equivalent Model in section Transistor Biasing and Low Frequencies of Analog Circuits

1 Answer

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Best answer
The correct choice is (b) 280mA

To elaborate: In given circuit, which is an emitter follower, current gain = 1 + hfe

IL = IB (1+hfe)

IL = 5mA(56) = 280 mA.

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