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(a) Figure 9 shows a cathode ray tube in which a beam of electrons is cast on the screen.
(i) State how electrons are produced in the tube.
(ii) State how the electron beam is detected.
(iii) State the reason for having a variable potential difference (p.d) at the:
(I) Grid
(II) Anodes
(b) Figure 10 shows the waveform of a signal applied at the y-plates of an oscilloscope whose time-base is switched to the scale of 2 milliseconds per
centimeter.
Determine:
(i) The period of the signal
(ii) The frequency of the signal.