2018 - JAMB Physics Past Questions and Answers - page 4
31
The process whereby a liquid turns spontaneously into vapour is called
A
regelation
B
evaporation
C
boiling
D
sublimation
32
The differences observed in solids, liquids and gases may be accounted for by
A
their relative masses
B
their melting points
C
the spacing and forces acting between the molecules
D
the different molecules in each of them
33
Convex mirrors are used as driving mirrors because images formed are
A
erect, Virtual and diminished
B
erect, real and diminished
C
erect, virtual and magnified
D
inverted, virtual and diminished
34
Musical instruments playing the same note can be distinguished from one another owing to the difference in their
A
quality
B
pitch
C
intensity
D
loudness
35
In the diagram shown, If the south-poles of two magnets stroke a steel bar, the polarities at T and V will respectively be
A
north and south
B
south and south
C
north and north
D
south and north
36
In homes, electrical appliances and lamps are connected in parallel because
A
less current will be used
B
less voltage will be used
C
parallel connection does not heat up the wires
D
series connection uses high voltage
37
An object moves in a circular path of radius 0.5m with a speed of 1ms\(^{-1}\). What is its angular velocity?
A
8rads\(^{-1}\)
B
4rads\(^{-1}\)
C
1rads\(^{-1}\)
D
2rads\(^{-1}\)
38
What effort will a machine of efficiency 90% apply to a load of 180N if its efforts arm is twice as long as its load arm?
A
100N
B
90N
C
80N
D
120N
39
Calculate the effective capacitance of the circuit in the diagram given
A
4μf
B
3μf
C
2μf
D
1μf
40
What flows to the earth by connecting the conductor to the earth?
A
Electrons
B
Ion
C
Neutron
D
Proton
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