Question : In an electron gun the control grid is given a negative potential relative to cathode in order to
A. decelerate electrons
B. 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 electrons
Answer:B
Question : In an electron gun the control grid is given a negative potential relative to cathode in order to
A. decelerate electrons B. 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 electrons