Question

Why are vacuum tubes also called valves? A) Because they can amplify the weak signals and make them strong B) Because they can stop or allow the flow of current C) Both of above D) None of above

Answer 1

Answer:

it is used as an amplifier

Answer 2

Because they can amplify the weak signals and make them strong.

Answer: Option A

Explanation:

"Vacuum tubes or electron tube" are made of glass-enclosed tubes through which electrons shoot from the metal conductor to another. The vacuum tube acts as one-way rectifier for the electrical circuits.

For example, in pre-dated bulbs, a bulb is filled with nitrogen induced halogen and a wire was passed through the gas. When an electrical current is passing through that wire electrons release from that wire and lights up the bulb.