The expected answers were:
(a)(i) Ohmmeter is used for measuring resistance / continuity test
(ii) Watthour meter is used for measuring energy consumed
(b) The function of a choke in a fluorescent fitting is to limit the current
flowing in an a.c. circuit.
(c) Active length of the coil, L = 20 X Π x 15
1000 = 0.94m
F = BLI (Newtons)
= 0.8 x 0.943 x 0.1
= 0.07SN
The question was on Measuring Instruments and Electromagnetic
Induction. It was quite unpopular. The performance was poor.
The recall question, part (a), was got by most of the candidates, while
the part (b) was not attempted by many. Most of the candidates did not
attempt part{c) and this was attributed to lack of exposure and
experience as pointed out by the Chief Examiner.