The current gain for a transistor working as common base amplifier is 0.96 . If the emitter current is 7.2 ~mA , then the base current is

Step-by-step solution

Given, current gain, =0.96 Emitter current, I_E=7.2 ~mA =7.2 10⁻³ ~A We know that, aligned & =I_C / I_E I_C & = I_E=0.96 7.2 10⁻³ ~A =6.91 10⁻³ ~A Also, I_E & =I_C+I_B I_B & =I_E-I_C=(7.2-6.91) 10⁻³ ~A & =0.29 10⁻³ ~A =0.29 ~mA aligned