What can a transistor do in order to fulfill its function in a circuit? check all that apply. control which layer is the emitter control its own semiconductance change the dopants in the transistor act like an insulator act like a conductor

It works like a conductor when current flows through it.It switches on its emitter and hence,

It control which layer is the emitter

It acts like a conductor

And being semiconductor since, it works like an insulator and conductor both

It control its own semiconductor.

Therefore, option 1,2 and 5 are correct.