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Physics
UTME / JAMB 2012
Linear Motion, Projectiles & Kinematics
Solution
A car starts from rest and moves with a uniform acceleration of 30ms-2 for 20s. Calculate the distance covered at the end of the motion
A
6km
B
12km
C
18km
D
24km
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
S = \(ut + \frac{1}{2}at^2\)
S = \(0 \times 2 + \frac{1}{2} \times 30 \times 20^2\)
Source: Myschool Past Questions Archive (Record #27377)
Physics
UTME / JAMB 2012
Atomic, Quantum, Nuclear Physics & Electronics
I. Small size.
II. Low power requirement
III. Not easily damaged by high temperature
IV. Highly durable.
Which of the above are the advantages of semiconductors?
A
I,II and lll only
B
ll,lll and lV only
C
l, II and lV only
D
l, ll, lll and lV
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: Official Exam / Past Question Archive
Physics
UTME / JAMB 2012
Circular Motion, Gravitation & Simple Harmonic Motion
A rocket is fired from the earth's surface to a distant planet. By Newton's law of universal gravitation, the force F will
A
increase as r reduces
B
increase as G varies
C
remains constant
D
increases as r increases
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 #27378)
Physics
UTME / JAMB 2012
Current Electricity & Electric Circuits
If a freely suspended object is pulled to one side and released, it oscillates about the point of suspension because the
A
acceleration is directly proportional to the displacement
B
motion is directed away from the equilibrium point
C
acceleration is directly proportional to the square of the displacement
D
velocity is minimum at the equilibrium ponit
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 #27382)
Physics
UTME / JAMB 2012
Circular Motion, Gravitation & Simple Harmonic Motion
Solution
An object moves in a circular path of radius 0.5m with a speed of 1ms-1 What is its angular velocity?
A
8 rads-1
B
4 rads-1
C
2 rads-1
D
1 rads-1
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
W = \(\frac{v}{r} = \frac{1}{0.5}\)
Source: Myschool Past Questions Archive (Record #27383)
Physics
UTME / JAMB 2012
Newton's Laws, Momentum & Collisions
Solution
An object of mass 20kg slides down an inclined plane at an angle of 30o to the horizontal. The coefficient of static friction is?
[g = 10ms-2]
A
0.2
B
0.3
C
0.5
D
0.6
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
\(\mu = tan\theta = tan30\)
Source: Myschool Past Questions Archive (Record #27384)
Physics
UTME / JAMB 2012
Work, Energy, Power & Simple Machines
Solution
A block and tackle is used to raise a load of 250N through a vertical distance of 30m. What is the efficiency of the system if the work done against friction is 1500J?
A
62.5%
B
73.3%
C
83.3%
D
94.3%
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
Y = \(\frac{work output}{work input} \times \frac{100}{1}\)
Y = \(\frac{250 \times 30}{250 \times 30 + 1500} \times \frac{100}{1}\)
Source: Myschool Past Questions Archive (Record #27385)
Physics
UTME / JAMB 2012
Elasticity, Density, Pressure & Fluids
Solution
If a load of 1 kg stretches a cord by 1.2cm, what is the force constant of the cord? {g=10ms-2}
A
866Nm-1
B
833Nm-1
C
769Nm-1
D
667Nm-1
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
K = \(\frac{F}{e}\)
K = \(\frac{1 \times 10}{\frac{0.2}{100}}\)
K = \(\frac{10}{12} \times \frac{1000}{1}\)
Source: Myschool Past Questions Archive (Record #27386)
Physics
UTME / JAMB 2012
Equilibrium of Forces, Moments & Flotation
Solution
An object of volume 1 m 3 and mass 2kg is totally immersed in a liquid of density 1 kgm-3 . Calculate its apparent weight.
A
20N
B
10N
C
2N
D
1 N
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
M = DV = 1 x 1 = 1kg
App Wt = (2 - 1)g = 1 x 10
= 10
Source: Myschool Past Questions Archive (Record #27387)
Physics
UTME / JAMB 2012
Elasticity, Density, Pressure & Fluids
The pressure at any point in a liquid at rest depends only on the
A
depth and the density
B
mass and the volume
C
quantity and the surface area
D
surface area and the viscosity
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 #27388)
Physics
UTME / JAMB 2012
Equilibrium of Forces, Moments & Flotation
Solution
A balloon whose volume is 300m3 is filled with hydrogen. If the density of air is 1.3 kgm-3, find the upthrust on the balloon. [g = 10ms-2]
A
3000N
B
3800N
C
3900N
D
4200N
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
F = mg = D x V x g = 1.3 x 300 x 10 = 3900
Source: Myschool Past Questions Archive (Record #27389)
Physics
UTME / JAMB 2012
Temperature, Thermometry & Thermal Expansion
Clinical thermometers are examples of
A
pressure gas thermometer
B
resistance thermometer
C
alcohol thermometer
D
mercury- in - glass thermometer
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 #27390)
Physics
UTME / JAMB 2012
Atomic, Quantum, Nuclear Physics & Electronics
Solution
Two metals P and Q are heated through the same temperature difference. If the ratio of the linear expansivities of P to Q is 2:3 and the ratio of their
length is 3: 4 respectively, the ratio of the increase in lengths of P to Q is
A
1:2
B
2:1
C
8:9
D
9:8
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
P: \(\frac{\alpha h \theta}{\alpha h \theta}\)
\(\frac{2 \times 3 \times \theta}{3 \times 4 \times \theta}\)
\(\frac{1}{2}\)
Source: Myschool Past Questions Archive (Record #27392)
Physics
UTME / JAMB 2012
Current Electricity & Electric Circuits
Solution
2000cm3 of a gas is collected at 27oC and 700mmHg. What is the volume of the gas at standard temperature and pressure?
A
1896.5cm3
B
1767.3cm3
C
1676.3cm3
D
1456.5cm3
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
\(V_2 = \frac{P_1V_1T_2}{P_2T_2}\)
\(V_2 = \frac{700 \times 2000 \times 273}{760 \times 300}\)
Source: Myschool Past Questions Archive (Record #27393)
Physics
UTME / JAMB 2012
Calorimetry, Latent Heat & Change of State
Solution
Calculate the temperature change when 500J of heat is supplied to 100g of water
[specific heat capacity of water = 4200JKg\(^{-1}\)k\(^{-1}\)]
A
12.1oC
B
2.1oC
C
1.2oC
D
0.1oC
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
\(\theta = \frac{Q}{MC}\)
\(\theta = \frac{500}{0.1 \times 4200}\) ≈ 1.2 ºC
Source: Myschool Past Questions Archive (Record #27395)