Question

A bipolar junction transistor (BJT) biased with Vₑ = ____, Vᵢ = ____, and Vc = ____ volts, has a collector current (Ic) given by the expression:

a) (I_c = V_cc - V_ceR_c)
b) (I_c = V_cc - V_ce2R_c)
c) (I_c = V_cc - V_ce3R_c)
d) (I_c = 2(V_cc - V_ce)R_c)

Answer 1

The correct expression for the collector current in a BJT is Ic = (Vcc - Vce) / Rc, which corresponds with option a) from the provided choices.

Step-by-step explanation:

The question pertains to the calculation of the collector current (Ic) in a bipolar junction transistor (BJT). The correct expression for the collector current, assuming conventional current flow (from positive to negative), is (Ic = (Vcc - Vce) / Rc) which means the collector-emitter voltage (Vce) is subtracted from the collector supply voltage (Vcc) and then divided by the collector resistor (Rc). Hence, the correct option is:

a) I_c = (V_cc - V_ce) / R_c

The given options in the question involve collector-emitter voltage and collector resistance, but there are incorrect numerators and denominators which do not conform to the standard formula for calculating collector current in a transistor circuit.