## 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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