2019 - JAMB Physics Past Questions and Answers - page 4
In the molecular explanation of conduction, heat is transferred by the
Free electrons
Free atoms
Free molecules
Free solids
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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
I & II
II & III
III & IV
IV & V
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Which of the following media allow the transmission of sound waves through them?
I. air
II. liquid
III. solids
I & II only
I & III only
II & III only
I, II & III
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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\(^2\))
6.7N/kg
7.9N/kg
8.0N/kg
9.8N/kg
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The following are parts of the eye
I. Retina
II. Pupil
III. Iris
The correct equivalent in the camera in the same order are
Diaphragm, Aperture, film
Aperture, Diaphragm, Film
Film, Diaphragm, Aperture
Film, Aperture, Diaphragm
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According to kinetic molecular model, in gases
The particles are closely packed together, they occupy minimum space & are usually arranged in a regular pattern
The particles occur in clusters with molecules slightly farther apart
The molecule are very fast apart & occupy all the space made available
The particle vibrate about fixed positions and are held together by the strong intermolecular bonds between them
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The momentum of a car moving at a constant speed in a circular track
can be both positive and negative
can be zero depending on its position in the track
can be zero depending on its position in the track
a centrifugal
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The lead-acid accumulator consists of
lead as the positive electrode
lead acid as the negative electrode
hydrochloric acid as the electrolyte
tetraoxosulphate (vi) acid as the electrolyte
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When water is boiling, it
gets hotter
increase is mass
decreases in mass
changes to steam
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A mixture of blue and red pigment when illuminated by white light will appear
green
orange
purple
magenta
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