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Friday, 22 May 2026
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Physics Past Questions and Answers

Jamb 1998 Physics Questions

Question 36:
Which of the following can be used to reduce local action in a Laclanche cell?
  • A A carbon rod as the positive pole
  • B Pure zinc as the negative pole
  • C Potassium permanganate solution in contact with the positive pole
  • D Common salt solution
View Answer & Explanation
Question 37:
Find the work done in moving a 2 C charge between two points X and Y in an electric field if the potential difference is 100 volts
  • A 50J
  • B 100J
  • C 200J
  • D 400J
View Answer & Explanation
Question 38:
A parallel plate capacitor has a common plate area of 5 x 10-8m2 and plate separation of 2 x 103m, Assuming free space, What is the capacitance? [\(\varepsilon\)o = 9.0 X 10-12C2N-1m-2]
  • A 2.25 x 10<sup style='font-size: smaller;'>-17</sup>F
  • B 4.50 x 10<sup style='font-size: smaller;'>-17</sup>F
  • C 2.25 x 10<sup style='font-size: smaller;'>-16</sup>F
  • D 4.50 x 10<sup style='font-size: smaller;'>-16</sup>F
View Answer & Explanation
Question 39:
The iron core of an induction coil is made from bundles of wire so as to
  • A Minimize eddy-currents
  • B Generate eddy-current
  • C Prevent sparking at the contact breaker
  • D Get the greatest posible secondary voltage
View Answer & Explanation
Question 40:
Electricity is supplied to a school along a cable of total resistance 0.5\(\Omega\) with the maximum current drawn from the mains as 100A. The maximum energy dissipated as heat for 1 hr is
  • A 3.6 x 10<sup style='font-size: smaller;'>3</sup>J
  • B 5.0 x 10<sup style='font-size: smaller;'>3</sup>J
  • C 3.0 x 10<sup style='font-size: smaller;'>5</sup>J
  • D 1.8 x 10<sup style='font-size: smaller;'>7</sup>J
View Answer & Explanation