Question

in an npn transistor, which terminal is responsible for controlling the flow of current? collector emitter base drain general properties of a diode include: it has a forward threshold voltage depending on material (si ≈ 0.7 v, ge ≈ 0.3 v) it can be used as a amplifier it allows current flow in one direction only (reverse bias) it can be used as a rectifier

Explanation:

In an NPN transistor, the base terminal controls the current flow between the collector and emitter. Regarding diodes, they have a forward - threshold voltage (Si ≈ 0.7 V, Ge ≈ 0.3 V), allow current flow in one direction (forward bias for conduction, reverse bias for non - conduction), and can be used as rectifiers. They cannot be used as amplifiers (transistors are used for amplification).

Answer:

1. C. Base
2. It has a forward threshold voltage depending on material (Si ≈ 0.7 V, Ge ≈ 0.3 V)

It allows current flow in one direction only (Forward bias for conduction, not reverse bias as stated in the option but the concept of one - way current flow is correct)
It can be used as a rectifier