Why is a sawtooth voltage applied to sweep?

In order for the beam to move along the horizontal axis at a constant speed, the voltage on the vertically deflecting plates must change linearly with time. And to quickly return the beam to its original position, the voltage must disappear very quickly. Therefore, a sawtooth voltage is applied.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.