Which is something that a vacuum tube cannot do?

A) change alternating current into direct current

B) turn a current on or off

C) increase the strength of a signal

D) concert electrical energy into thermal energy

Question

Physics

Susie

10 August, 03:16

Which is something that a vacuum tube cannot do?

A) change alternating current into direct current

B) turn a current on or off

C) increase the strength of a signal

D) concert electrical energy into thermal energy

+4

Answers (2)

Know the Answer?

BB · Answer 1

D) concert electrical energy into thermal energy

Nibbles · Answer 2

D

Explanation:

A vacuum tube is a glass tube that creates the conditions of a vacuum to allow for electric current to pass through it.

Originally, vacuum tubes were used in electronics to amplify electric signals, however, today they have been replaced by more efficient systems, such as transistors.

A vacuum tube can change alternating current into direct current, it can turn a current on or off, and as stated above, it can increase the signal strength. However, it cannot change electrical energy into thermal energy, and that is why the answer is D.

Which is something that a vacuum tube cannot do?A) change alternating current into direct currentB) turn a current on or offC) increase the strength of a signalD) concert electrical energy into thermal energy

Which is something that a vacuum tube cannot do?

A) change alternating current into direct current

B) turn a current on or off

C) increase the strength of a signal

D) concert electrical energy into thermal energy