What is the use of an electron gun?

Important Questions on Thermionic Emission and Radioactivity

MEDIUM

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

What do you mean by fluorescent screen?

MEDIUM

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

Explain about the deflection system of CRT.

EASY

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

What is the function of: electron gun

MEDIUM

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

Briefly explain the working of a fluorescent screen.

EASY

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

CRT stands for current-ray tube.

EASY

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

CRT stands for _____-ray tube.

EASY

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

Fluorescent screen converts electrical signals to visual signals.

MEDIUM

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

What is the function of electron gun and pair of deflecting plates in cathode ray tube?

EASY

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

CRTs are used in the majority of desktop computer displays.

EASY

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

How can you increase the brightness of spot on the screen.

EASY

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

The _____-ray tube's function is to transform an electrical signal into a visual display.

EASY

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

Write any one application of CRT.

HARD

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

Draw a cathode ray tube consisting of a heater, a cathode, a cylindrical anode and a deflecting system. Show how will you connect a low tension battery of $6 \mathrm{V}$ and a high tension one of $1000 \mathrm{V}$ to the electrodes of the tube.

MEDIUM

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

When a/an _____ beam impacts a fluorescent screen, it forms a bright spot due to fluorescence.

HARD

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

Draw a cathode ray tube consisting of a heater, a cathode, a cylindrical anode and a deflecting system. Why are materials of low work function preferred as thermionic cathode materials?

EASY

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

CRT is deflected by magnetic and electric fields.

MEDIUM

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

Name the main part of cathode ray oscillograph or Tube (CRT) and state their functions.

EASY

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

How is a cathode ray tube used to convert an electrical signal into a visual signal ?

EASY

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

If electric and magnetic fields are applied simultaneously in the deflecting region, is it possible for electron beam to pass undeviated, explain.

EASY

Science>Physics>Thermionic Emission and Radioactivity>Hot Cathode Ray Tube

A cathode ray tube (CRT) is a type of vacuum tube that produces images when an electron beam collides with a phosphorescent surface.