The expected responses were:
(a)        (i) Component parts of a cathode ray tube

• Cathode
• Grid
• Accelerating anode
• Focusing anode
• X – plate
• Y – plate
• Screen
• Pre-accelerator anode

(ii) AC quantities that can be measured by cathode ray oscilloscope

• Voltage
• Current
• Frequency
• Period
• Phase shift

(b)        (i)        Triggered/Astable multivibrator                     
(ii)        Provides/serves as a time base generator       

This question tested the familiarity of the candidates with the cathode ray tube and the oscilloscope. It was reported that in question (a), only a few candidates listed more than two of the component parts of a cathode ray tube. Likewise, many candidates could not provide the quantities that can be measured by a CRO.

The oscilloscope has a time base (a saw-tooth signal generator), whose functionality is controlled by a trigger circuit. It is correct therefore, to state that the oscillator is a triggered- astable multivibrator, which functions to provide the time-base signal. Majority of the candidates did not respond well to question (b).