2022 - JAMB Physics Past Questions and Answers - page 3
The vapour pressure___?
increases non-linearly with measuring temperature
increases linearly with increasing temperature
decreases linearly with increasing temperature
decreases non-linearly ith measuring temperature
According to Clausius–Clapeyron relation, the vapour pressure of any substance increases non-linearly with temperature.
The potential energy in an elastic string of force constant k, which has an extension X is?
kX
KX\(^{2}\)
½KX\(^{2}\)
½K
A reservoir is filled with liquid of density 2000 kgm\(^{-1}\). Calculate the depth at which the pressure in the liquid will be equal to 9100 Nm\(^{-2}\) (g = 10 ms\(^{-2}\))
0.262 m
0.664 m
0.819 m
0.455 m
Let:
pressure = p
depth/height = h
density = d
gravity = g
p = hdg
\(\frac{p}{dg} = h\)
\(\frac{9100}{10 * 2000} = h\)
h = 0.455m
Water is not a good thermometric liquid because it___?
expands unevenly between 0 ºC and 4 ºC
maintains fixed density
has low freezing point
wets glass
Because water wets glass, has a higher freezing point and lower boiling point than many other liquids, low thermal expansivity, high specific capacity, and high vapour pressure.
Which of these is a second-class lever?
sugar tongs
claw hammer
plier
wheelbarrow
Examples of second-class levers:
- bottle opener
- wheelbarrow
- an oar
Examples of first-class levers:
- weighing balance
- pliers
- claw hammer
- scissors
- crowbar
In the formation of sea breeze, the wind blows from?
sky to land
sea to sky
land to sea
sea to land
Which component of the fibre-optic connector has a provision of entry for the fibre along with the fixation to connector housing?
couplers
cable
ferrule
connector housing
Fibre optic couplers are used to split the input signals into two or more outputs, they are called splitters in this case. On the other hand, some types of couplers can be used to combine two or more inputs into one single output, they are called combiners in this case.
More.
The most suitable instrument to view the sun is ___
helioscope
telescope
stroboscope
sun meter
A helioscope is an instrument for viewing the Sun without harming the eye. It is used for observing the sun and sunspots. The helioscope was first used by Benedetto Castelli and later refined by Galileo Galilei.
The eclipse of the moon occurs when?
the moon reflects the rays from the sun to the earth
the moon comes exactly between the earth and the sun
the earth comes exactly between the moon and the sun
the sun comes exactly between the earth and the moon
Lunar eclipses occur when Earth is positioned between the Moon and Sun and the Earth's shadow is cast on the surface of the Moon.
The gravitational pull on the moon is \(\frac{1}{6}\) that of the earth. If a body weighs 6.0 N on the moon, what will be its weight on the earth?
6.0 N
5.0 N
12.0 N
36.0 N
A body would weigh six times less on the moon than it weighs on Earth. In other words, the body would weigh six times more on the earth than it weighs on the moon.
Hence,
\(\frac{1}{6} of x\) = 6.0N on the moon
x = 6 * 6
x = 36