Question

Why vacuum tube is replaced in current appliances?

• A. Bigger size
• B. Needs high power
• C. Low life
• D. All of the above

Answer 1

The correct option is D All of the above

Many disadvantages of vacuum tube lead to its replacement in current appliances like TV sets and computers.

It requires high power to operate, it is bulky, have low life, etc.

Because of these major disadvantages, vacuum tubes are not used in current appliances.

Hence, option $\left(D\right)$ is the correct answer.