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Physics
UTME / JAMB 1983
Atomic, Quantum, Nuclear Physics & Electronics
The range of wavelengths of the visible spectrum is 400nm - 700nm. The wavelength of gamma rays is
A
longer than 700nm
B
shorter than 700nm but longer then 400nm
C
550nm
D
shorter than 400nm
E
infinite
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 #28832)
Physics
UTME / JAMB 1983
Temperature, Thermometry & Thermal Expansion
Solution
If the pressure on 100cm3 of an ideal gas is doubled while its kelvin temperature is halved, then the new volume of the gas will become
A
25cm3
B
50cm3
C
100cm3
D
200cm3
E
400cm3
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
\(\frac{P_1V_1}{T_1}\) = \(\frac{P_2V_2}{T_2}\)
P\(_2\) = 2P\(_1\) ; T\(_1\) = 2T\(_2\)
V\(_2\) = \(\frac{P_1 \times V_1 \times T_2}{T_1 \times P_2}\) = \(\frac{P_1 \times 100 \times T_2}{2T_2 \times 2P_1}\) = \(\frac{100}{4}\)
= 25cm\(^3\)
Source: Myschool Past Questions Archive (Record #28833)
Physics
UTME / JAMB 1983
Current Electricity & Electric Circuits
Solution
A train has an initial velocity of 44ms-1 and an acceleration of -4ms-1. Its velocity after 10 seconds is
A
2ms-1
B
4ms-1
C
8ms-1
D
12ms-1
E
16ms-1
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
Using V = at + u
V = (-4 x 10) + 44
= 4ms-1
Source: Myschool Past Questions Archive (Record #28834)
Physics
UTME / JAMB 1983
Reflection, Refraction & Dispersion of Light
Which of the following conditions are necessary and sufficient for total internal reflection to take place at the boundary between two optical media? i. light is passing from optically denser medium to optically less dense medium. ii. light is passing from optically less dense medium to optically denser medium. iii. angle of incidence is greater. iv. angle of incidence is lesser
A
i and ii only
B
ii and iii only
C
ii and iv only
D
i and iii only
E
ii and iv only
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 #28835)
Physics
UTME / JAMB 1983
Current Electricity & Electric Circuits
Solution
A man of mass 50kg ascends a flight of stairs 5m high in 5 seconds. If acceleration due to gravity is 10ms-2, the power expended is?
A
100W
B
200W
C
250W
D
400W
E
500W
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
Power = \(\frac{\text{force x distance}}{\text{time}}\)
= \(\frac{50 X 10 X 5}{5}\)= 500W
Source: Myschool Past Questions Archive (Record #28836)
Physics
UTME / JAMB 1983
Lenses & Optical Instruments
Solution
Which of the following arrangements in the sequence shown can be used to obtain a pure spectrum of white light?
A
source, slit, converging lens, prism, converging lens, screen.
B
source, slit, diverging lens, prism, diverging lens, screen.
C
source, converging lens, prism, diverging lens, screen.
D
source, slit, prism, diverging lens, converging lens, screen.
E
source, slit, prism, diverging lens, sreen.
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
Dispersion is the separation of white light into its component colours.
The correct sequence of arrangement that can be used to obtain pure spectrum is as follows; source, slit, converging lens, prism, converging lens, screen.
Source: Myschool Past Questions Archive (Record #28841)
Physics
UTME / JAMB 1983
Current Electricity & Electric Circuits
Solution
A milliameter with full scale deflection of 10mA has an internal resistance of 5 ohms. It would be converted to an ammeter with a full scale deflection of 1A by connecting a resistance of
A
\(\frac{5}{99}\)ohms in series with it
B
\(\frac{5}{99}\)ohms in parallel with it
C
\(\frac{99}{5}\)ohms in series with it
D
\(\frac{99}{5}\)ohms in parallel with it
E
2 ohms in series with it
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
I = 1 - (10 x 10-3)
= 0.99A
IR = 10 x 10 x 10-3 x 5
R = \(\frac{5}{99}\)\(\Omega\)
Source: Myschool Past Questions Archive (Record #28842)
Physics
UTME / JAMB 1983
Temperature, Thermometry & Thermal Expansion
Solution
The linear expansivity of brass is 2 x 10-5 oC-1. If the volume of a piece of brass is 10cm3 at 0oC, what will be its volume at 100oC?
A
10.02cm3
B
10.04cm3
C
10.06cm3
D
10.20cm3
E
102.00cm3
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
3 x \(\alpha\) = \(\frac{V_2 - V_1}{\Delta \theta \times V_1}\)
3 x 2 x 10-5 = \(\frac{V_2 - 10}{10 \times 100}\)
V2 = 10.06cm3
Source: Myschool Past Questions Archive (Record #28844)
Physics
UTME / JAMB 1983
Current Electricity & Electric Circuits
Solution
A 24V potential difference is applied across a parallel combination of four 6-ohms resistor, The current in each resistor is
A
1A
B
4A
C
16A
D
18A
E
36A
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
\(I = \frac{24}{6}\)
= 4A
Source: Myschool Past Questions Archive (Record #28851)
Physics
UTME / JAMB 1983
Current Electricity & Electric Circuits
Solution
The electrochemical equivalent of a metal is 0.126 x 10-6 kgC-1. The mass of the metal that a current of 5A will deposit from a suitable bath in 1 hour is
A
0.0378 x 10 -3kg
B
0.227 x 10 -3kg
C
0.378 x 10 -3kg
D
0.595 x 10 -3kg
E
2.268 x 10 -3kg
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
m = Itz
= 5 x 3600 x 0.126 x 10-6
= 2.268 x 10-3kg
Source: Myschool Past Questions Archive (Record #28855)
Physics
UTME / JAMB 1983
Waves, Sound & Vibrations
Solution
Ripples on water are similar to light waves in that they both
A
have the same wavelength
B
are longitudinal
C
cannot be reflected
D
travel at the same speed
E
can be refracted and diffracted
medium Difficulty
Verified Correct Answer: Option E
Physical Principles & Numerical Solution
Both ripples on water and light waves are transverse waves hence they exhibit all the properties of waves such as reflection, refraction, diffraction, interference, and plane polarization.
Source: Myschool Past Questions Archive (Record #28857)
Physics
UTME / JAMB 1983
Equilibrium of Forces, Moments & Flotation
A piece of wood is floating on water. The forces acting on the wood are
A
upthrust and reaction
B
weight and reaction
C
weight and upthrust
D
upthrust and viscousity
E
weight and viscousity
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #28858)
Physics
UTME / JAMB 1983
Units, Measurements & Dimensional Analysis
Solution
Of the following derived units, the one that is not a unit of power is
A
joule/second
B
ampere volt
C
ampere2volt
D
volts2/ohm
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
Power = \(\frac{Work done}{time}\) = \(Js^{-1}\)
Power = \(current \times voltage\) = \(Ampere volt\)
Power = \(\frac{voltage^{2}}{resistance}\) = \(\frac{volts^{2}}{ohm}\)
Source: Myschool Past Questions Archive (Record #28859)
Physics
UTME / JAMB 1983
Current Electricity & Electric Circuits
Solution
a force of 16N applied 4.0kg block that is at rest on a smooth, horizontal surface. What is the velocity of the block at t = 5 seconds?
A
4ms-1
B
10ms-1
C
20ms-1
D
50ms-1
E
80ms-1
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
F = ma
= \(\frac{m(u - v)}{t}\)
16 = \(\frac{4(v - 0)}{5}\)
v = 20ms-1
Source: Myschool Past Questions Archive (Record #28862)
Physics
UTME / JAMB 1983
Current Electricity & Electric Circuits
Solution
1,000 identical drops of oil of density 500kgm-3 have a total mass of 5 x 10-4kg. One of the drops forms a thin film of area 0.5m2 on water. The thickness of the film is
A
2 x 10-8m
B
2 x 10-9m
C
2 x 10-7m
D
3 x 10-9m
E
2.8 x 10-8m
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
Mass of one oil = \(\frac{5 \times 10^{-4}}{1000}\)
= 5 x 10\(^{-7}\)kg
Density = \(\frac{\text {mass}}{\text{area x thickness}}\)
500 = \(\frac{5 \times 10^{-7}}{\text{0.5 x thickness}}\)
thickness = 2 x 10\(^{-9}\)m
Source: Myschool Past Questions Archive (Record #28863)