Question

A pnp transistor is used in common-emitter mode in an amplifier circuit. A change of 40 µA in the base current brings a change of 2 mA in collector current and 0.04 V in base emitter voltage. Which of the following is the correct value of the input resistor R_in?

Options

• R_in = 9 kΩ

• R_in = 75 kΩ

• R_in = 1 kΩ

• None of these

Answer 1

R_in = 1 kΩ