Question Library
Browse, filter, and study verified past examination questions with step-by-step mathematical reasoning.
Searching 18,000+ Questions...
Sifting topics, KaTeX formulas & verified solutions
Showing 10051–10065 of 29821 verified questions
Sort by:
Physics
UTME / JAMB 2012
Reflection, Refraction & Dispersion of Light
The use of lenses is Not applicable in the
A
projector
B
human eye
C
periscope
D
telescope
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 #27411)
Physics
UTME / JAMB 2012
Current Electricity & Electric Circuits
Disperson of white light is the ability of white light to
A
penetrate air, water and glass
B
move in a straight line
C
move around corners
D
separate to its component colours
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 #27412)
Physics
UTME / JAMB 2012
Current Electricity & Electric Circuits
A newly charged 12V accumulator can easily start a car whereas eight new dry cells in series with a effective e.m.f. of 12V cannot start the same car because
A
The current capacity is high
B
The current capacity is low
C
it cannot be re-charged
D
it cannot easily be connected to a car
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 #27415)
Physics
UTME / JAMB 2012
Current Electricity & Electric Circuits
The fuse in an electric device is always connected to the
A
neutral side of an electric supply
B
earth side of an electric supply
C
live side of an electric supply
D
terminal side of an electric supply
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 #27417)
Physics
UTME / JAMB 2012
Magnetism, Electromagnetism & AC Circuits
Solution
A particle carrying a charge of 1. 0 x 10-8C enters a magnetic field at 3.0x 10-2 ms -1 at right angles to the field. If the force on this particle is 1.8 x 10-8N, what is the magnitude of the field?
A
6.0x10-1T
B
6.0x10T
C
6.0x10-3T
D
6.0x10-4T
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
F = BQV
B = \(\frac{F}{QV}\)
B = \(\frac{1.8 \times 10^{-8}}{1.0 \times 10^{-8} \times 3.0 \times 10^{-2}}\)
Source: Myschool Past Questions Archive (Record #27419)
Physics
UTME / JAMB 2012
Current Electricity & Electric Circuits
Solution
The current output from of an a.c. source is given as I = 10 sin to t. The d.c equivalent of the current is
A
5.0A
B
7.1A
C
10.0A
D
14.1A
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
Irms = \(\frac{10}{\sqrt{2}}\)
Source: Myschool Past Questions Archive (Record #27420)
Physics
UTME / JAMB 2012
Magnetism, Electromagnetism & AC Circuits
A conductor of length 1m moves with a velocity of 50ms-1 at an angle of 30o to the direction of a uniform magnetic field of flux density 1.5Wbm-2. What is the e.m.f induced in the conductor?
A
37.5V
B
50.5V
C
75.0V
D
80.5V
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 #27421)
Physics
UTME / JAMB 2012
Atomic, Quantum, Nuclear Physics & Electronics
The process of detecting a pin mistakenly swallowed by a child is X-ray
A
Diagnosis
B
Therapy
C
Crystallography
D
Mammography
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 #27422)
Physics
UTME / JAMB 2012
Atomic, Quantum, Nuclear Physics & Electronics
Which of the following CANNOT be deflected by both electric and magnetic fields?
A
Gamma rays
B
Alpha particles
C
Wave particles
D
Beta particles
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 #27423)
Physics
UTME / JAMB 2012
Atomic, Quantum, Nuclear Physics & Electronics
Solution
A piece of radioactive material contains 1000 atmos. If its half -life is 20seconds, the time taken for 125 atoms to remain is
A
20 seconds
B
40 seconds
C
80 seconds
D
60 seconds
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
1000 → 500 → 250 → 125
20 + 20 + 20 = 60s
Source: Myschool Past Questions Archive (Record #27424)
Physics
UTME / JAMB 2012
Atomic, Quantum, Nuclear Physics & Electronics
The p-n junction diodes can act as rectifiers because they
A
conduct current when forward-biased
B
conduct current when reverse-biased
C
block current when forward-biased
D
conduct current in both directions
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 #27425)
Physics
UTME / JAMB 2012
Atomic, Quantum, Nuclear Physics & Electronics
Solution
If a reverse-biased voltage is applied across a p-n junction, the depletion layer width is
A
increased
B
decreased
C
constant
D
halved
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
The width of the depletion layer in a p-n junction diode increases in reverse bias as charge carriers are swept into battery terminals, holes from the p-type into the negative terminal, and electrons from the n-type into the positive terminal.
Source: Myschool Past Questions Archive (Record #27426)
Physics
WAEC / WASSCE 2012
Equilibrium of Forces, Moments & Flotation
Which of the following devices is used to determine the relative density of an acid?
A
manometer
B
hydrometer
C
hypsometer
D
hygrometer
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 #35522)
Physics
WAEC / WASSCE 2012
Current Electricity & Electric Circuits
Solution
A block of wood of density 0.6 gcm\(^{-3}\), weighing 3.06N in air, floats freely in a liquid of density 0.9 gcm\(^{-3}\). Calculate volume of the portion immersed (g = 10ms\(^{-2}\))
A
510cm3
B
340cm3
C
254cm3
D
170cm3
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
V = \(\frac{M}{D}\)
= \(\frac{3.06}{10} \times \frac{1000}{0.9} = 340\)
Source: Myschool Past Questions Archive (Record #35525)
Physics
WAEC / WASSCE 2012
Elasticity, Density, Pressure & Fluids
Solution
A metal ball of weight W falls through a column of glycerine of viscosity V. If the ball experiences an upthrust U and terminal velocity is attained, then
A
W > U + V
B
W = U + V
C
W = U - V
D
W < U + V
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
When terminal velocity is attained, The equation of motion becomes
mg - V - U = 0
\(\therefore\) mg = W = U + V
Source: Myschool Past Questions Archive (Record #35526)