Fig. 8.1 gives the basic layout of a cathode-ray oscilloscope (c.r.o.). Several components are missing. Electrons are released from the filament by thermionic emission.
(a)[2]
Explain what thermionic emission means.
(b)[2]
Electrons strike the screen at high speed. Explain how the electrons are caused to move at high speed.
(c)[2]
The spot on the screen is moved up and down, and also across the screen. The c.r.o. parts that do this are not shown in Fig. 8.1. On Fig. 8.1, draw and label the parts that are needed.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Electrons are emitted” …