For a common base amplifier, the current gain is 0.54. What is the collector current if the emitter current is 6.8 mA?

1.7 mA 2.7 mA 3.7 mA 4.7 mA

3.7 mA

In Common base amplifier, $\beta = \frac{\Delta I_C}{\Delta I_E} = 0.54$ $\Delta I_C = \Delta I_E \times \beta = 6.8mA \times 0.54 = 3.7mA$