Is increased
Is decreased
Remains the same
None of the above
Answer is Right!
Answer is Wrong!
The correct answer is: A. Is increased.
The control grid is a metal electrode located between the cathode and the anode in a cathode ray tube (CRT). It is used to control the intensity of the electron beam that strikes the screen of the CRT. When the negative potential on the control grid is increased, the electrons are more strongly attracted to the anode and the intensity of the electron beam is increased. This results in a brighter spot on the screen.
The other options are incorrect because:
- Option B is incorrect because when the negative potential on the control grid is increased, the electrons are more strongly attracted to the anode and the intensity of the electron beam is increased. This results in a brighter spot on the screen.
- Option C is incorrect because when the negative potential on the control grid is increased, the electrons are more strongly attracted to the anode and the intensity of the electron beam is increased. This results in a brighter spot on the screen.
- Option D is incorrect because the intensity of the spot is increased when the negative potential on the control grid is increased.