- #1

bottlesheep

http://home.netvigator.com/~cyberforce/img/phy.jpg [Broken]

I have learn transistor just few lessons..

For a)

what i learn is that R1 and R2 would share Vin

that's mean there is p.d. when current flows via R1, R2

thus, Vin = VR1 + VR2

and i am confused if the current flows via them is the same

that's mean I1 and I2 are the same...

but if they are the same....

how come the question ask me both of the seperately??

..Should they be different??

and for IB, I am confused too.

Because when i learnt Transistor,

there is a Base bias resistor,say RB, in the circuit

thus, VR2 = (IB)(RB) + VBE

but now there is no RB, so VR2 = VBE..

then I think that there is no potential difference, so no IB

but it seems that I am wrong....

coz part b) assume the current gain is 100..

that means (IC)/(IB) =100, which implies there is IB...

so I don't know how to do the question at all..

I am not good at English and presentation...

I don't know if you understand what I don't understand...

my physics is poor...

please help....

are my concepts totally wrong..??? > <..

thank you for your help....

I have learn transistor just few lessons..

For a)

what i learn is that R1 and R2 would share Vin

that's mean there is p.d. when current flows via R1, R2

thus, Vin = VR1 + VR2

and i am confused if the current flows via them is the same

that's mean I1 and I2 are the same...

but if they are the same....

how come the question ask me both of the seperately??

..Should they be different??

and for IB, I am confused too.

Because when i learnt Transistor,

there is a Base bias resistor,say RB, in the circuit

thus, VR2 = (IB)(RB) + VBE

but now there is no RB, so VR2 = VBE..

then I think that there is no potential difference, so no IB

but it seems that I am wrong....

coz part b) assume the current gain is 100..

that means (IC)/(IB) =100, which implies there is IB...

so I don't know how to do the question at all..

I am not good at English and presentation...

I don't know if you understand what I don't understand...

my physics is poor...

please help....

are my concepts totally wrong..??? > <..

thank you for your help....

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