What is a vacuum tube?
Q: What is a vacuum tube?
A: A vacuum tube is an electronic device that controls electric current flow in older model radios, television sets, and amplifiers.
Q: What is the difference between a vacuum tube and a valve?
A: There is no difference between a vacuum tube and a valve, they are the same electronic device just called by different names in British English.
Q: How are electrons emitted in a vacuum tube?
A: Electrons are emitted from a heated cathode, through a process called thermionic emission, and are accepted by the anode.
Q: What are vacuum tubes typically made of?
A: Vacuum tubes are typically made of glass which makes them fragile and prone to breaking.
Q: Do vacuum tubes require heat to operate?
A: Yes, vacuum tubes require heat to operate efficiently.
Q: What was the ENIAC and how were vacuum tubes used in it?
A: The ENIAC was one of the first computers and vacuum tubes were used in it to ensure it continued operating.
Q: Is the use of vacuum tubes still common in modern electronics?
A: No, vacuum tubes are not commonly used in modern electronics as they have largely been replaced by more efficient solid-state electronics.
