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Electronic Devices and Circuits

Q1:

The modulation of effective base width by collector voltage is known as Early effect, hence reverse collector voltage

A increases both a and β

B decrease both a and β

C increase a but decrease β

D decrease a but increase β

ANS:C - increase a but decrease β

Because of reach through effect, the effective base width becomes zero and hence, base current Ib reduce. So beta will increase and also alpha will increase beta = Ic/Ib and alpha = Ic/Ie.

So both alpha and beta will increase.



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