Understanding Electricity Lesson 10 Electronics

How do electrons move from place to place in a vacuum tube?

What are the three basic parts of a vacuum tube?

The two kinds of cathodes used in vacuum tubes are called the ___ heated and the ___ heated.

An electron tube that contains nothing but a cathode and an anode is called a(n)

A diode can conduct current continuously only when the anode is ___ and the cathode is ___.

What is the name of a vacuum tube with three electrodes?

A(n) ____ heated cathode does not reach emission temperature as quickly as a(n) ___ heated cathode.

Today, photoelectric control circuits use _____ or ____ instead of vacuum tubes.

A(n) _____ is a material with more resistance than a conductor, but less than an insulator.

The elements ____ and ____ are used a semiconductor materials.