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Physics
UTME / JAMB 1979
Calorimetry, Latent Heat & Change of State
The temperature at which the water vapour present in the air saturates the air and begins to condense is known as
A
boiling point
B
melting point
C
triple point
D
dew point
E
critical temperature
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #29165)
Physics
UTME / JAMB 1979
Gas Laws & Heat Transfer
Solution
Which of the following types of waves cannot travel through a vacuum?
A
sound waves
B
light waves
C
infra-red waves
D
x-radiation
E
radio waves
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
Sound waves are mechanical waves that require a medium (such as air, water, or solids) to propagate.
Light waves, infra-red waves, x-radiation, and radio waves are electromagnetic waves and can travel through a vacuum.
Source: Myschool Past Questions Archive (Record #29167)
Physics
UTME / JAMB 1979
Circular Motion, Gravitation & Simple Harmonic Motion
Solution
If in a simple pendulum experiment the length of the inextensible string is increased by a factor of four, its period is increased by a factor of
A
4
B
\(\frac{\pi}{2}\)
C
\(\frac{1}{4}\)
D
2\(\pi\)
E
2
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
In simple pendulum, T = 2\(\pi\)\(\sqrt\frac{L}{g}\)
\(\frac{T_2}{T_1}\) = \(\sqrt\frac{L_1}{L_2}\) but, L2 = 4L1
\(\frac{T_2}{T_1}\) = \(\sqrt\frac{L_1}{4L_1}\)
T2 = 4T1
Source: Myschool Past Questions Archive (Record #29168)
Physics
UTME / JAMB 1979
Current Electricity & Electric Circuits
In what range of temperature is the expansion of water anomalous?
A
+208oC to +212oC
B
-80oC + -76oC
C
-4oC to 0oC
D
+96oC to +100oC
E
0oC to +4oC
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option E.
Source: Myschool Past Questions Archive (Record #29175)
Physics
UTME / JAMB 1979
Current Electricity & Electric Circuits
When the vapour of a substance is in equilibrium with its own liquid, it is said to be
A
gaseous
B
unsaturated
C
liquefied
D
diffused
E
saturated
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option E.
Source: Myschool Past Questions Archive (Record #29177)
Physics
UTME / JAMB 1979
Waves, Sound & Vibrations
Solution
If the wavelength of a wave travelling with a velocity of 360ms-1 is 60m, the period of the wave is
A
6s
B
3.6s
C
0.17s
D
0.61s
E
3s
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
V = \(\alpha\)F and F = \(\frac{1}{T}\)
v = \(\frac{\pi}{T}\)
T = \(\frac{60}{360}\)
T = 0.17s
Source: Myschool Past Questions Archive (Record #29180)
Physics
UTME / JAMB 1979
Temperature, Thermometry & Thermal Expansion
Solution
The heights of the mercury thread in a mercury-in-glass thermometer when in melting ice and then in steam are 3cm and 18cm respectively. At a temperature of 60oC the height would be
A
7.5cm
B
9cm
C
10.8cm
D
12cm
E
12.6cm
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
18cm .... 100oC
x .... 60oC
3cm .... 0oC
\(\frac{x - 3}{18 - 3}\) = \(\frac{60 - 0}{100 - 0}\)
= 12cm
Source: Myschool Past Questions Archive (Record #29184)
Physics
UTME / JAMB 1979
Lenses & Optical Instruments
Solution
An object is placed 30cm from a concave mirror of focal length 15cm. the linear magnification of the image produced is
A
o
B
\(\frac{2}{3}\)
C
1
D
2
E
3
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
U = 30cm = 2f = r
V = 30cm
hence, m = \(\frac{v}{u}\) = \(\frac{30}{30}\)
= 1
Source: Myschool Past Questions Archive (Record #29185)
Physics
UTME / JAMB 1979
Gas Laws & Heat Transfer
If a given mass at constant pressure obeys the relation...volume is proportional to the absolute temperature...the gas is said to obey
A
Hooke's Law
B
Boyle's Law
C
Dalton's Law
D
Charles' Law
E
Newton's Law
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #29188)
Physics
UTME / JAMB 1979
Current Electricity & Electric Circuits
A man standing between two parallel mirrors in a barber's shop will see the following number of his own image
A
eight
B
two
C
four
D
one
E
infinite
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option E.
Source: Myschool Past Questions Archive (Record #29189)
Physics
UTME / JAMB 1979
Current Electricity & Electric Circuits
Solution
Which of the following statements is incorrect? The sensitivity of a galvanometer which incorporates an optical lever arrangement may be increased by providing
A
a larger number of turns in the coil
B
a thinner suspension with a small torsional control
C
a special alloy permanent magnet which gives a high magnetic flux
D
all of the above
E
a light source with a greater intensity
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
A light source with a greater intensity. While it can improve visibility, it does not affect the sensitivity of the galvanometer
Source: Myschool Past Questions Archive (Record #29191)
Physics
UTME / JAMB 1979
Current Electricity & Electric Circuits
Solution
A landlord has eight 40W electric light bulbs, four 60W bulbs and two 100W bulb in his house. If he has all the points on for five hours daily and if N.E.P.A. charges 5k per unit, his bill for 30 days is
A
N5.70
B
N7.23
C
N3.65
D
N8.05
E
N4.50
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
Total power = (8 x 40) + (40 x 60) + (2 x 100)
= 760W
Energy(Kwhr) = power x time
= 760 x 10-3 x 150
= 114kwhr.
If, 1kwhr. cost 5k
thus, 114 kwhr. will cost 5 x 114
= N5.70
Source: Myschool Past Questions Archive (Record #29198)
Physics
UTME / JAMB 1979
Elasticity, Density, Pressure & Fluids
Which of the following statements is correct? The reading of pressure on a mercury barometer is independent of
A
the cross-sectional area of the tube
B
the atmospheric pressure
C
the density of mercury
D
the temperature of mercury
E
the acceleration due to gravity
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #29199)
Physics
UTME / JAMB 1979
Gas Laws & Heat Transfer
What are the units of thermal conductivity?
A
kg.m.sec2
B
Joule sec-1m-1k-1
C
kg.m
D
Newton sec-1m2
E
m3
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #29200)
Physics
UTME / JAMB 1979
Magnetism, Electromagnetism & AC Circuits
Which of the following statements is correct? The magnetized state of an iron bar can be destroyed completely by
A
heating the bar to a high temperature
B
breaking the bar
C
connecting opposite poles with a small piece of iron
D
placing the bar inside a strong magnetic field
E
none of the above
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #29201)