Courses » JAMB » JAMB Physics » Physics Exam Topics » 1998 - Questions and Answers

1998 - JAMB Physics Past Questions and Answers - page 3

21

A vapour is said to be saturated when

A
more molecules return to the liquid than the amount that left it
B
a dynamic equilibrium exists between the molecules of the liquid and the vapour molecules at a given temperature
C
the vapour pressure is equal to the atmospheric pressure
D
all molecules are moving with the same speed in all directions at a given temperature
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22

One valid assumption of the kinetic theory of gasses is the

A
the molecules of a gas are constantly in a state of motion and the number of collision remains constant
B
the number of molecule of gas increases with increasing pressure
C
as the temperature increases, the number of collision made by the gas molecule remains constant
D
the molecules of gas are all identical and are very small in size
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23

The physical properties of sound waves can best be described by

A
reflection and diffraction
B
polarization and reflection
C
polarization and diffraction
D
polarization and refraction
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24

In a closed organ pipe producing a musical note, an antinode will always be produced at

A
the closed end
B
the open end
C
the middle
D
all the parts of the pipe
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25

A steel wire of length 0.50m is stretched between two fixed points and its fundamental frequency is 200Hz. The speed of the wave in the wire is

A
100ms-1
B
120ms-1
C
200ms-1
D
250ms-1
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26

In a resonance tube experiment, if the fundamental frequency of the vibrating air column is 280Hz, the frequency of the third overtone is

A
70Hz
B
840Hz
C
1120Hz
D
1960Hz
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27

An object 0 lies at a distance m in front of concave mirror of focal length f. If m < f, then the final image obtained will be

A
virtual and diminished
B
magnified and erect
C
real and inverted
D
diminished and erect
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28

An object is placed in front of two plane mirrors inclined at an angle of 0o. If the total number of images formed is 7, Find the value of (\theta)

A
30o
B
45o
C
51o
D
90o
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29

The most suitable type of mirror used for the construction of the search light is the

A
concave mirror
B
convex mirror
C
spherical mirror
D
parabolic mirror
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30

The displacement d produced in a glass block of thickness t and refractive index n when an object is viewed through it is

A
t – n
B
t (1 + 1/n)
C
t (1-1/n)
D
t (1/n - 1)
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