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Physics Paper 2, Nov/Dec. 2009  
Questions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Main
General Comments
Weakness/Remedies
Strength












Question 8
Part I:      Candidates were required to answer any five questions from this part.
  1. What is an electron “gun”?
  2. Name one equipment in which an electron gun is an essential component.
_____________________________________________________________________________________________________
Observation

This question was unpopular.  Almost all the candidates failed to include “narrow beam” in their definition of “electron gun” and so lost valuable marks.

The expected answers are:

(a)        An “electron gun” is a device that produces a narrow beam of high speed/velocity
            electrons.
e.g
(b)        -           Cathode ray tube
            -           X-ray tube
            -           Cathode ray oscilloscope
            [Accept any other correct equipment].

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