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Physics
UTME / JAMB 2018
Heat Energy & Temperature
Diagram
In the diagram given the hanging mass m2 is adjusted until m1 is on the verge of sliding. The coefficient of static
Attached Figure / Diagram
A
\(\frac{m_1}{m_2}\)
B
\(\frac{m_1g}{m_2}\)
C
\(\frac{m_2}{m_1}\)
D
\(\frac{m_2g}{m_1}\)
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 #47393)
Physics
UTME / JAMB 2018
Heat Energy & Temperature
Diagram
In the diagram shown, which of the simple pendulum will resonate with P when set into oscillation?
Attached Figure / Diagram
A
U
B
T
C
R and T
D
Q and R
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 #47403)
Physics
UTME / JAMB 2018
Heat Energy & Temperature
The time rate of loss of heat by a body is proportional to the
A
temperature of its surroundings
B
temperature of the body
C
difference in temperature between the body and its surroundings
D
ratio of the temperature of the body to that of its surroundings
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 #47404)
Physics
UTME / JAMB 2018
Heat Energy & Temperature
The process whereby a liquid turns spontaneously into vapour is called
A
regelation
B
evaporation
C
boiling
D
sublimation
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 #47407)
Physics
UTME / JAMB 2018
Heat Energy & Temperature
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
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 #47408)
Physics
UTME / JAMB 2018
Heat Energy & Temperature
Solution
The inner diameter of a small test tube can be measured accurately using a
A
Micrometres screw gauge
B
Pair of dividers
C
Metre rule
D
Pair of vernier calliper
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
A vernier scale is a visual aid to take an accurate measurement reading between two graduation markings on a linear scale by using mechanical interpolation; thereby increasing resolution and reducing measurement
Source: Myschool Past Questions Archive (Record #47678)
Physics
UTME / JAMB 2018
Heat Energy & Temperature
Solution
A pulley system has three pulleys in the fixed block and two in the movable block and if the pulley has an efficiency of 72%, the mechanical advantage of the system is?
A
36.0
B
7.2
C
5.0
D
3.6
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Mechanical Advantage = V.R \times Efficiency
= 5 \times 0.72
= 3.6
Source: Myschool Past Questions Archive (Record #47679)
Physics
UTME / JAMB 2018
Heat Energy & Temperature
Diagram
In the diagram shown, If the south-poles of two magnets stroke a steel bar, the polarities at T and V will respectively be
Attached Figure / Diagram
A
north and south
B
south and south
C
north and north
D
south and north
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 #47431)
Physics
UTME / JAMB 2018
Heat Energy & Temperature
Diagram
Solution
Calculate the effective capacitance of the circuit in the diagram given
Attached Figure / Diagram
A
4μf
B
3μf
C
2μf
D
1μf
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
The three 2µf capacitors from the left are parallel. Therefore, effective capacitance in parallel = 6µf
The 6µf, 2µf(opposite the 3µf), and the 3µf are in series.
So effective/total capacitance in series = \(\frac{1}{C_T}\) = \(\frac{1}{C_1}\) + \(\frac{1}{C_2}\) + \(\frac{1}{C_3}\)
= \(\frac{1}{6}\) + \(\frac{1}{2}\) + \(\frac{1}{3}\) = \(\frac{1 + 3 + 2}{6}\) = \(\frac{6}{6}\)
C\(_T\) = 1µf
Source: Myschool Past Questions Archive (Record #47435)
Physics
UTME / JAMB 2018
Heat Energy & Temperature
Solution
Which of the following phenomena is the practical evidence for the existence of the continual motion of molecules.
A
Transitional Motion
B
Rotational Motion
C
Brownian Motion
D
Oscillatory Motion
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
Brownian motion, also called Brownian movement, any of various physical phenomena in which some quantity is constantly undergoing small, random fluctuations.
If a number of particles subject to Brownian motion are present in a given medium and there is no preferred direction for the random oscillations, then over a period of time the particles will tend to be spread evenly throughout the medium.
Source: Myschool Past Questions Archive (Record #47729)
Physics
UTME / JAMB 2018
Heat Energy & Temperature
Which of the following instruments is most suitable for measuring the outside diameter of a narrow pipe in a few millimeters in diameter?
A
Pair of calipers
B
Meter rule
C
Micrometer screw gauge
D
Tape rule
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 #47745)
Physics
UTME / JAMB 2018
Heat Energy & Temperature
Solution
When a known standard resistor of 2.0 is connected to the 0.0cm end of a metre bridge, the balance point is found to be at 55.0cm
A
1.10Ω
B
1.64Ω
C
2.44Ω
D
27.50Ω
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
\(\frac{R_1}{R_2}\) = \(\frac{(100- L_1)}{( L_1)}\)
\(\frac{R_1}{2}\) = \(\frac{45}{55}\)
R\(_1\) = 2 \times \(\frac{45}{55}\)
= 1.64\Omega
this is because the known resistor is connected to 0.00cm end and balances at 55cm
Source: Myschool Past Questions Archive (Record #47761)
Physics
WAEC / WASSCE 2018
Heat Energy & Temperature
The pitch of a note is not affected by
A
frequency
B
tension in a vibrating string
C
mass of a vibrating string
D
amplitude of sound wave
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 #49738)
Physics
WAEC / WASSCE 2018
Heat Energy & Temperature
Which of the following statements is not an advantage of an alkaline accumulator?
A
The electrolyte does not need attention
B
It can be recharged
C
It has low internal resistance
D
It has a much longer life than lead-acid accumulator
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 #49817)
Physics
WAEC / WASSCE 2018
Heat Energy & Temperature
Diagram
The diagram above illustrates the wire connections to a three-pin plug. The wires P, Q and R respectively are:
Attached Figure / Diagram
A
live, neutral and earth
B
neutral, earth and live
C
earth, live and neutral
D
earth, neutral and live
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 #49823)