thermionic emission

thermionic emission

5th Grade

15 Qs

quiz-placeholder

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thermionic emission

thermionic emission

Assessment

Quiz

Physical Ed, Physics

5th Grade

Practice Problem

Medium

Created by

AMINUDDIN BAHARUDDI

Used 77+ times

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15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

one of the properties of cathode rays is

positive charge

does not move in a straight line

can be deflected by electrical field

cannot be deflected by magnetic field

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

I use thermionic emission to emit a stream of electrons and display them on a screen.

Cathode-Ray Oscilloscope

Raster-Scan Display

Random-Scan Display

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Process of emission of electrons from hot metal surfaces is called

photoelectric effect

thermionic emission

static emission

emission current

4.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Particles emitted from a hot cathode surface are:

negative ions

photon

protons

electrons

5.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Cathode rays carry

negative charge

positvie charge

neutral particles

electrons and protons

6.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Cathode rays can be deflected by

electric fields only

magnetic fields only

quantum fields

magnetic and electric fields

7.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

How are the electrons made into a beam?

Using a high voltage across the tube.

Use of an anode to spread the electrons.

Use of positive anode to focus the electrons.

Use of a fluorescent coating at the end of the tube.

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