Physics 2019 Past Questions | JAMB

Study the following Physics past questions and answers for JAMBWAEC  NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.

31. In the molecular explanation of conduction, heat is transferred by the

  • A. Free electrons
  • B. Free atoms
  • C. Free molecules
  • D. Free solids

32. The conductivity of gases at low pressure can be termed as

I. hot cathode emission
II. thermo ionic emission
III. cold cathode emission
IV. Field emission

  • A. I & II
  • B. II & III
  • C. III & IV
  • D. IV & V

33. Which of the following media allow the transmission of sound waves through them?

I. air
II. liquid
III. solids

  • A. I & II only
  • B. I & III only
  • C. II & III only
  • D. I, II & III

34.  The earth’s gravitational field intensity at its surface is about

(G = 6.7 × 10\(^{-11}\)Nm\(^2\)/kg\(^2\), mass of the earth is 6 × 10\(^{24}\)kg, radius of the earth is 6.4 × 10\(^6\)m, g on the earth = 9.8m/s\(^2\))

  • A. 6.7N/kg
  • B. 7.9N/kg
  • C. 8.0N/kg
  • D. 9.8N/kg

35. The following are parts of the eye

I. Retina
II. Pupil
III. Iris
The correct equivalent in the camera in the same order are

  • A. Diaphragm, Aperture, film
  • B. Aperture, Diaphragm, Film
  • C. Film, Diaphragm, Aperture
  • D. Film, Aperture, Diaphragm

36. According to kinetic molecular model, in gases

  • A. The particles are closely packed together, they occupy minimum space & are usually arranged in a regular pattern
  • B. The particles occur in clusters with molecules slightly farther apart
  • C. The molecule are very fast apart & occupy all the space made available
  • D. The particle vibrate about fixed positions and are held together by the strong intermolecular bonds between them

37. A force of 6N acts horizontally on a stationary mass of 2kg for 4s. The kinetic energy gained by the mass is _________

38. The momentum of a car moving at a constant speed in a circular track

  • A. can be both positive and negative
  • B. can be zero depending on its position in the track
  • C. can be zero depending on its position in the track
  • D. a centrifugal

39.  A metal rod has a length of 100cm at 200°C. At what temperature will its length be 99.4cm. If the linear expansivity of the material of the nod is 2 × 10\(^{-5}\)C\(^{-1}\)

40. The lead-acid accumulator consists of

  • A. lead as the positive electrode
  • B. lead acid as the negative electrode
  • C. hydrochloric acid as the electrolyte
  • D. tetraoxosulphate (vi) acid as the electrolyte
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