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Tuesday, 21 April 2026
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Physics Past Questions and Answers

Jamb 2008 Physics Questions

Question 36:
When a pure semiconductor is heated, its resistance
  • A Increases
  • B Decreases
  • C Remains the same
  • D Increases and then decreases
View Answer & Explanation
Question 37:
I. for current amplification.
II. for voltage stabilization.
III. for power amplification.
IV. as a switch.
which of the above are the uses of transistor?
  • A I,II,III and IV
  • B I,III, and IV only
  • C I, II and III only
  • D I,II and IV only
View Answer & Explanation
Question 38:
The dimension of electromotive force are `
  • A ML<sup style='font-size: smaller;'>2</sup>T<sup style='font-size: smaller;'>-3</sup>I<sup style='font-size: smaller;'>-1</sup>
  • B ML<sup style='font-size: smaller;'>2</sup>T<sup style='font-size: smaller;'>-3</sup>I<sup style='font-size: smaller;'>-2</sup>
  • C M<sup style='font-size: smaller;'>2</sup>LT<sup style='font-size: smaller;'>-2</sup>I<sup style='font-size: smaller;'>-1</sup>
  • D M<sup style='font-size: smaller;'>2</sup>L<sup style='font-size: smaller;'>2</sup>T<sup style='font-size: smaller;'>-1</sup>I<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 39:
The resultant of two forces 12N and 5N is 13N. What is the angle between the two forces?
  • A 0<sup style='font-size: smaller;'>o</sup>
  • B 45<sup style='font-size: smaller;'>o</sup>
  • C 90<sup style='font-size: smaller;'>o</sup>
  • D 180<sup style='font-size: smaller;'>o</sup>
View Answer & Explanation
Question 40:
A force F required to keep a 5 kg mass moving round a cycle of radius 3.5 m at a speed of 7 ms-1. What is the speed, if the force is tripled?
  • A 4.0 ms<sup style='font-size: smaller;'>-1</sup>
  • B 6.6 ms<sup style='font-size: smaller;'>-1</sup>
  • C 12.1 ms<sup style='font-size: smaller;'>-1</sup>
  • D 21.0 ms<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation