In an electron gun the control grid is given a negative potential… - Vidyadip

MCQ

In an electron gun the control grid is given a negative potential relative to cathode in order to

A
Decelerate electrons
✓
Repel electrons and thus to control the number of electrons passing through it
C
To select electrons of same velocity and to converge them along the axis
D
To decrease the kinetic energy of electrons8.

✓

Answer

Correct option: B.

Repel electrons and thus to control the number of electrons passing through it

b
(b) You must know the working of an electron gun. In an electron gun the control grid is given a negative potential relative to cathode in order to repel electrons and thus to control the number of electrons passing through it

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