Teacha
  • Courses
  • Mock Exams
  • For Tutors
  • For Schools
  • Pricing
Log InStart Free
  1. Past Questions
  2. /
  3. UNIBEN
  4. /
  5. General Paper
  6. /
  7. 2007/2008
  8. /
  9. Q18
Question 18

a siren having a ring of 200 holes makes 132 revolutions per minute. a jet of air is directed on the set of holes. calculate the frequency of the note produced (take the speed of sound in air as 350m/s)

  • A.26.0Hz
  • B.1.52 Hz
  • C.440 Hz
  • D.0.66 Hz
Objective

Question details

Exam body
UNIBEN
Subject
General Paper
Year
2007/2008
Question no.
#18
Type
Objective
Previous · Q17when illuminated by light beam, a smoke particle in oxygen gas can be seen… Next · Q19 a concave mirror of focal length 20cm form image 1/2 the size of the object…

More from this paper

  • Q14a uniform meter rule of weight 1.0N is pivoted at the 40cm mark. a weight of…
  • Q15two lane mirror inclined at angle of 60°C to each other. determine the…
  • Q16when an oil drop is placed gently on a clean water surface of area 100 3
  • Q20a pool of water is 12m deep, what is its apparent depth (refractive index of…
  • Q21in the optical system of the eye and lens camera, which statements is not true?
  • Q22a cell needed 0.30m of the wire of a potentiometer to balance its e.m.f, but…
See all General Paper 2007/2008 questions
Teacha

Africa's learning & exam readiness platform. Built for students, tutors, and schools.

Platform

  • Courses
  • Mock Exams
  • Past Questions

For You

  • I'm a Tutor
  • I'm a School
  • Pricing

© 2025 Teacha. Built for African learners, tutors, and schools. Teacha is not affiliated with WAEC, NECO, or JAMB. All past questions are sourced from publicly available materials.

Privacy PolicyTerms of UseCookie Policy