Physics 10 Chapter 16 - Basic Electronics - 3

Physics 10 Chapter 16 - Basic Electronics - 3

1. The properties of which of the following is studied by electron gun?

a) Anode rays beam
b) Electron beam
c) Neutron beam
d) Proton beam

2. Which instrument is used to investigate the properties of electron beam?

a) A fluorescent screen
b) Proton gun
c) Neutron gun
d) Electron gun

3. The electrons are produced by thermionic emission from a tungsten filament heated by ..............supply?

a) 10 V
b) 0.3 V
c) 6 V
d) 30 V

4. Where the whole set up of electron gun is fitted?

a) In an evacuated glass bulb
b) In a metal case
c) In a non-metal casing
d) In a battery

5. When an electron beam passes between the two parallel plates in an electric field, towards which plate electrons are deflected?

a) Towards the negative plate
b) Towards the neutral plate
c) Towards the positive plate
d) Goes straight

6. When an electron beam passes between the two parallel plates in an electric field, whatare deflected towards the positive plate?

a) Neutrons
b) Positrons
c) Electrons
d) Protons

7. When an electron beam passes between the two parallel plates in an electric field, why electronsare deflected towards the positive plate?

a) Because electrons arerepelled by the positive charges
b) Because electrons are attracted by the negative charges
c) Because electrons goes straight
d) Because electrons are attracted by the positive charges

8. When an electron beam passes between the two parallel plates in an electric field, why electronsare deflected towards the positive plate?

a) Because electrons arerepelled by the positive charges
b) Because electrons are attracted by the negative charges
c) Because electrons are repelled by the negative charges
d) Because electrons goes straight

9. Due to which force, electrons are attracted by the positive charges?

a) F = q / E
b) F = q E
c) F = E / q
d) F = P A

10. What is typical value of current?

a) 0.6 A
b) 0.3 A
c) 6 A
d) 3.0 A

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