Using an oscilloscope

Question 1

What does an oscilloscope consist of?

Answer 1

electron tube and associated control circuits

an electron gun at one end of the glass tube emits electrons in a beam toward a fluorescent screen at the other end of the tube

light is emitted from the spot on the screen where the beam hits the screen

Question 2

What is the position of the spot of light on the screen affected by?

Answer 2

the pd across the pair of deflecting plates