Electronic Devices - BJT Devices - Discussion
Discussion Forum : BJT Devices - General Questions (Q.No. 13)
13.
Use this table of collector characteristics to calculate 
ac at VCE = 15 V and IB = 30 
A.
ac at VCE = 15 V and IB = 30 A. 
Discussion:
17 comments Page 1 of 2.
Mini said:
1 decade ago
But If we compare both Vce = 15V and Ib = 30uA combined then the value of Ic should be greater than 3mA.
(1)
Amiel said:
2 weeks ago
Which one is correct? Please explain in detail.
Emery said:
2 decades ago
Vce = 15v at Ib = 30uA is equal Ic = 3mA,
so, beta = Ic/Ib
= 3mA/30uA
= 100...^_^
so, beta = Ic/Ib
= 3mA/30uA
= 100...^_^
Amiel said:
2 weeks ago
Yes, you are right. Thanks @Rajashekar.
Bertoroyto said:
6 years ago
@ Bac,
Vce is constant, that's why Ic(sat) = 3 mA
Bac= Ic/Ib.
Bac= 3mA/30uA,
Bac= 100.
Vce is constant, that's why Ic(sat) = 3 mA
Bac= Ic/Ib.
Bac= 3mA/30uA,
Bac= 100.
Ayaz satti said:
6 years ago
From graph.
Ic = 3mA and Ib given is 30uA.
So, B= Ic/Ib = 3mA/30uA = 100A.
Ic = 3mA and Ib given is 30uA.
So, B= Ic/Ib = 3mA/30uA = 100A.
Rajashekar said:
7 years ago
(IC3-IC2)÷5 = 30uA where ic2 =150uA.
(Ic2-ic1)÷5 = 20uA,
Ic1-0)÷5 = 10uA so ic1=50uA,
Ic3 = 3uA.
(Ic2-ic1)÷5 = 20uA,
Ic1-0)÷5 = 10uA so ic1=50uA,
Ic3 = 3uA.
Mrs NAIK said:
9 years ago
IC is 3.2mA so 3.2/30=106 is Ans.
Faami said:
9 years ago
I too agree @Wilson.
Wilson Komla said:
10 years ago
I think the exact value for Ic can't be read from the graph unless approximations are done.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers