Q 37 In only one of the circuits given below, the lamp L lights Which circuit is it - Physics - Semiconductor Electronics Materials Devices And Simple Circuits

Question

Q 37 In only one of the circuits given below, the lamp L lights
Which circuit is it? Give reason for your answer
Circuit (a)

Circuit (b)

Vipra Mishra · Accepted Answer

Dear Student ,
In the first circuit the emitter base junction is not biased , so
no current flows across L , therefore hence lamp L does not light
Where as in the second circuit the emitter base junction is forward
biased so emitter and hence collector current hence flows and lamp
L lights up

Hope this helps you
Regards

Q.37. In only one of the circuits given below, the lamp L lights. Which circuit is it? Give reason for your answer. Circuit (a) Circuit (b)

Q.37. In only one of the circuits given below, the lamp L lights. Which circuit is it? Give reason for your answer.
Circuit (a)

Circuit (b)