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Physics 10 Chapter 16 - Basic Electronics - 2
1.
In 1897, J.J Thomson observed the deflection of ...........rays by both electric and magnetic fields?
a) Anionic
b) Anode
c) Positive
d) Cathode
2.
Which charge cathode rays contain?
a) Neutron
b) Negative charge
c) Neutral charge
d) Positive charge
3.
What are negatively charged particles called that are present in cathode rays?
a) Protons
b) Nucleons
c) Neutrons
d) Electrons
4.
What is the process of emission of electrons from the hot metal surfaces called?
a) Thermionic emission
b) Atomic emission
c) Cellular emission
d) Nuclear emission
5.
Which of the following are present in metals?
a) Free protons
b) Non-free protons
c) Non-free electrons
d) Free electrons
6.
The process by which electrons are emitted by a hot metal surface is known as......................?
a) Evaporation
b) Thermionic emission
c) Boiling
d) Conduction
7.
In a cathode-rays tube, a .............glow is formed on the inner surface of the glass opposite the cathode?
a) Greenish
b) Purplish
c) Blackish
d) Bluish
8.
The particles emitted from a hot cathode surface are.............?
a) Protons
b) Positive ions
c) Negative ions
d) Electrons
9.
What is produced by electrically heating a fine tungsten filament?
a) Thermionic emission
b) Nuclear emission
c) Atomic emission
d) Cellular emission
10.
What is typical value of voltage?
a) 0.3 V
b) 3.0 V
c) 6 V
d) 0.6 V
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