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Saturday, 02 May 2026
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Physics Past Questions and Answers

Jamb Physics Questions

Question 326:
A device that converts sound energy into electrical energy is
  • A The horn of a motor car
  • B An A.C. generator
  • C A microphone
  • D The telephone
  • E Radio waves
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Question 327:
Which of the following i. \(\beta\)-particles ii. protons iii. neutrons iv. \(\alpha\)-particles. may be found in light nuclei?
  • A I and ii
  • B I and iii
  • C Ii and iv
  • D Ii and iii
  • E I, ii and iii
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Question 328:
Radio waves have a velocity of 3 x 108ms-1. A radio station sends out a broadcast on a frequency of 800kHz. The wavelength of the broadcast is
  • A 375.0m
  • B 267.0m
  • C 240.0m
  • D 37.5m
  • E 26.7m
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Question 329:
What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 kobo per kWh?
  • A N0.65
  • B N0.13
  • C N3.90
  • D N39.00
  • E N234.00
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Question 330:
Which of the following statements is (are) NOT true about the emission of the photoelectrons from metallic surfaces?
i. all metallic surfaces emits the same number of photoelectrons in a given light
ii. most metallic surfaces emit the same number of photoelectrons in visible and infra-red light
iii. a metallic surface emits photoelectrons only if the frequency of the incident light is higher than its own characteristics threshold frequency
  • A I only
  • B Ii only
  • C I and ii
  • D Ii and iii
  • E Iii only
View Answer & Explanation