Question

Question 8 CIRCUIT D.2 (2.5 Marks) Statement: Sketching relevant output (Vc-Ic) characteristics decide on Q-point coordinates and DC load-line details: That is, determine DC operating conditions of the NPN-BJT/Si circuit of Fig.8 (denoting the type Circuit D2). Assume the following: Vcc= 10 volt; VE = 1.8 volt; Rc = 2.0 k; RB2 = 25 k and a = 0.98958.

please choose one of the answer choices above.

Must show all work, thank you!

Answer 1

The correct option is (2).

For a Si transistor, we know that V_BE = 0.7 Volt

We can write V_BE = V_B - V_E

But given that V_E = 1.8 Volt

So, V_B = V_BE + V_E = 0.7 + 1.8 = 2.5 Volt

The current I₂ = V_B / R_B2

Given that R_B2 = 25 k

So, I₂ = 2.5 / (25 $\times$ 10³) = 0.1 mA

As the values of V_B and I₂ are only matching with option (2), hence we can say that the correct option is (2). Other values can be found out by making suitable assumptions.