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Physics
UTME / JAMB 2005
Heat Energy & Temperature
Solution
The ray which causes gas molecules to glow is known as
A
cathode ray
B
anode ray
C
molecular ray
D
gamma ray
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
The ray which causes gas molecules to fluoresce or glow is the cathode rays
Source: Myschool Past Questions Archive (Record #13714)
Physics
UTME / JAMB 2005
Heat Energy & Temperature
Solution
The process whereby the molecules of different substances move randomly is called?
A
capillarity
B
surface tension
C
osmosis
D
diffusion
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. This movement occurs due to the random motion of particles, leading to an even distribution of substances over time.
Source: Myschool Past Questions Archive (Record #13748)
Physics
UTME / JAMB 2005
Heat Energy & Temperature
Solution
The process whereby a liquid turns spontaneously into vapour is called?
A
regelation
B
sublimation
C
boiling
D
evaporation
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Evaporation is a process by which molecules undergo a spontaneous transition from the liquid phase to the gaseous phase
Source: Myschool Past Questions Archive (Record #13755)
Physics
UTME / JAMB 2005
Heat Energy & Temperature
Solution
A motorcyclist traveling at 30ms\(^{-1}\) starts to apply his brakes when he is 50m from the traffic light that had just turned red. If he reached the traffic light, his decceleration is
A
18 ms\(^{-2}\)
B
10 ms\(^{-2}\)
C
9 ms\(^{-2}\)
D
5 ms\(^{-2}\)
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
To determine the deceleration of the motorcyclist, we can use the kinematic equation that relates initial velocity, final velocity, acceleration, and distance:
\(v^2 = u^2 + 2as\)
Where: \( v \) = final velocity (0 m/s, since he stops at the traffic light), \( u \) = initial velocity (30 m/s), \( a \) = acceleration (deceleration, which will be negative)
\( s \) = distance (50 m)
Substituting the values into the equation, we rearrange it to solve for \( a \):
\(0 = (30)^2 + 2a(50)\)
Calculating \( (30)^2 \):
\(0 = 900 + 100a\)
Now, rearranging for \( a \):
\(100a = -900\)
\(a = -\frac{900}{100} = -9 \, \text{m/s}^2\)
The deceleration of the motorcyclist is \( \mathbf{9 \, m/s^2} \).
Source: Official Exam / Past Question Archive
Physics
UTME / JAMB 2005
Heat Energy & Temperature
Diagram
Solution
In the circuit diagram of a transistor above, the terminal P, Q and R represent
Attached Figure / Diagram
A
EMITTER, BASE and COLLECTOR
B
COLLECTOR, EMITTER and BASE
C
BASE, COLLECTOR and EMITTER
D
BASE, ENITTER and COLLECTOR
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
The fig above shows a conventional transistor, showing the three basic features, the Base, the Emitter and the collector. Thus comparing this with the figure in the question it implies that P = Emitter, Q = Base and R = collector
Source: Myschool Past Questions Archive (Record #14276)
Physics
UTME / JAMB 2005
Heat Energy & Temperature
Solution
\( ^{235} _{92}U + ^1 _0n → ^{144} _{56}Ba + ^{90} _{36}Kr +2X \)
In the reaction above, X is
A
electron
B
proton
C
neutrino
D
neutron
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
\( ^{235} _{92}U + ^1 _0n → ^{144} _{56}Ba + ^{90} _{36}Kr +2^1_0X \)
In the reaction above, balancing the left with the right shows that X is a neutron
Source: Myschool Past Questions Archive (Record #14277)
Physics
UTME / JAMB 2005
Heat Energy & Temperature
Diagram
Solution
The value of F in the figure above when in equilibrium is
Attached Figure / Diagram
A
10N
B
12N
C
20N
D
27N
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
F = \(\frac{17}{sin 60} = \frac{17}{0.866}\)
= 20N
Source: Myschool Past Questions Archive (Record #14272)
Physics
UTME / JAMB 2005
Heat Energy & Temperature
Diagram
Solution
If the system above is in equilibrium, the tension in the string Q is
Attached Figure / Diagram
A
11N
B
9N
C
4N
D
6N
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
If the string is in equilibrium, the the tension in the string Q = 4N + 5N = 9N
Source: Myschool Past Questions Archive (Record #14274)
Physics
WAEC / WASSCE 2005
Heat Energy & Temperature
Each of the following physical quantities is classified as a vector or a scalar quantity. Which of the classifications is correct?
A
electric potential (Vector)
B
momentum (scalar)
C
gravitational field intensity (scalar)
D
magnetic flux density (vector)
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 #34425)
Physics
WAEC / WASSCE 2005
Heat Energy & Temperature
Which of the following statements about a spring balance and/or a chemical balance is not correct?
A
the chemical balance operates on the principle of moments
B
the sprin balance operates on Hooke's law
C
either may be used to measure the weight of a substance
D
the reading of a spring balance changes over the surface of the earth, while that of the chemical balance remaind constant
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 #34426)
Physics
WAEC / WASSCE 2005
Heat Energy & Temperature
The friction which exists between two layers of liquid in relative motion is called
A
capillarity
B
surface tension
C
viscosity
D
cohension
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 #34427)
Physics
WAEC / WASSCE 2005
Heat Energy & Temperature
Which of the following simple machines is a second class lever?
A
wheel barrow
B
crowbar
C
claw hammer
D
seesae
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 #34429)
Physics
WAEC / WASSCE 2005
Heat Energy & Temperature
Which of the following phenomena is the practical evidence for the existence of the continual motion of molecules?
A
Translational motion
B
rotational motion
C
brownian motion
D
oscillatory motion
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 #34419)
Physics
WAEC / WASSCE 2005
Heat Energy & Temperature
Solution
A wheel and axle of radii 800mm and 200mm respectively is used to raise a body of weight 800N by the application of 250N. Calculate the efficiency of the machine
A
85%
B
80%
C
60%
D
20%
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
V.R = \(\frac{R}{r} = \frac{800}{200} = 4\)
M.A = \(\frac{L}{E} = \frac{800}{250} = 3.2\)
y = \(\frac{M.A}{v.R} \times \frac{100}{1} = 80\)%
Source: Myschool Past Questions Archive (Record #34430)
Physics
WAEC / WASSCE 2005
Heat Energy & Temperature
Which of the following type of motion does a body undergo when acted upon by a couple?V
A
vibrational
B
translational
C
rotational
D
random
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 #34439)