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 9541–9555 of 14893 verified questions
Sort by:
Physics
UTME / JAMB 1997
Atomic, Quantum, Nuclear Physics & Electronics
The electromagnetic waves that are sensitive to temperature changes are
A
X-rays
B
Gamma-rays
C
Ultra-violet rays
D
Infra-red rays
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 #27715)
Physics
UTME / JAMB 1997
Current Electricity & Electric Circuits
Solution
Three electric cells each of e.m.f 1.5V and internal resistance of 1.0\(\Omega\) are connected in parallel across an external resistance of \(\frac{2}{3}\)\(\Omega\). Calculate the value of the current in the resistor
A
0.5 A
B
0.9A
C
1.5A
D
4.5A
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
E.m.f = 1.5
r = \(\frac{1 \times\ 1 \times 1}{(1 \times\ 1) + (1 \times\ 1) + (1 \times\ 1)}\)
r = \(\frac{1}{3}\)\(\Omega\)
I = \(\frac{E.m.f}{r + R}\)
I = \(\frac{1.5}{\frac{1}{3}\ + \frac{2}{3}}\)
I = 1.5A
Source: Myschool Past Questions Archive (Record #27717)
Physics
UTME / JAMB 1997
Current Electricity & Electric Circuits
A galvanometer of internal resistance 50\(\Omega\) has a full scale deflection for a current of 5mA. What is the resistance required to covert it to a voltmeter with full scale deflection of 10V?
A
1750\(\Omega\)
B
1950\(\Omega\)
C
2000\(\Omega\)
D
2500\(\Omega\)
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 #27723)
Physics
UTME / JAMB 1997
Current Electricity & Electric Circuits
Solution
If 8 x 10\(^{-2}\) J of work is required to move 100\(\mu\)C of charge from a point X to a point Y in an electrical circuit, the potential difference between X and Y is
A
4.0 x 102 v
B
4.0 x 104 v
C
8.0 x 102 v
D
8.0 x 10-2 v
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
V = \(\frac{W}{Q}\)
V = \(\frac{8 \times\ 10^{-2}}{100 \times\ 10^{-6}}\)
V = 8.0 x 10\(^2\) v
Source: Myschool Past Questions Archive (Record #27728)
Physics
UTME / JAMB 1997
Current Electricity & Electric Circuits
Solution
In a meter bridge experiment, two resistor 2\(\Omega\) and 3\(\Omega\) occupy the left and right gaps respectively. Find the balance point from the left side of the bridge
A
20cm
B
40cm
C
60cm
D
80cm
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
Let the point be x
\(\frac{2}{x}\) = \(\frac{3}{100 - x}\)
making x subject of formula,
2(100 - x) = 3x
200 - 2x = 3x
200 = 3x + 2x
200 = 5x
divide both side by 5
x = 40cm
Source: Myschool Past Questions Archive (Record #27730)
Physics
UTME / JAMB 1997
Electrostatics & Capacitors
Solution
Two 50\(\mu\)F parallel plate capacitors are connected in series. The combined capacitor is then connected across a 100-V battery. The charge on each plate of the capacitor is
A
5.00 x 10-5C
B
2.50 x 10-3C
C
1.25 x 10-3C
D
1.00 x 10-2C
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
For series, C = \(\frac{50 \times\ 50}{50 + 50}\)
C= 25\(\mu\)F
Q = CV
Q = 25 x 100 x 10-3
Q = 2.5 x 10-3C
Source: Myschool Past Questions Archive (Record #27732)
Physics
UTME / JAMB 1997
Current Electricity & Electric Circuits
Solution
What is the total electrical energy consumed by using an electric cooker rated 1000W for 5 hrs?
A
5.3 x 103J
B
6.5 X 103J
C
1.8 X 107J
D
2.3 X 107J
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
Energy = power x time
= 1000 x 5 x 3600
= 1.8 X 107J
Source: Myschool Past Questions Archive (Record #27733)
Physics
UTME / JAMB 1997
Magnetism, Electromagnetism & AC Circuits
Solution
The power dissipated in an a.c. circuit with an r.m.s, current of 5A, r.m.s voltage of 10V and a phase angle of 60o is
A
25W
B
50W
C
120W
D
125W
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
P = IVcos\(\theta\)
= 5 x 10 x cos60
= 25W
Source: Myschool Past Questions Archive (Record #27734)
Physics
UTME / JAMB 1997
Current Electricity & Electric Circuits
Solution
The voltage of the domestic electric supply is represented by the equation V = 311 sin314.2t. Determine the frequency of the a.c. supply [\(\pi\) = 3.142]
A
50.0Hz
B
100.0Hz
C
311.0Hz
D
314.2Hz
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
V = 311 sin314.2t compare with,
V = V sin2\(\pi\)Ft
2\(\mu\)F = 314.2
F = \(\frac{314.2}{2 \times\ 3.142}\)
F = 50Hz
Source: Myschool Past Questions Archive (Record #27735)
Physics
UTME / JAMB 1997
Current Electricity & Electric Circuits
In a purely inductive circuit, the current
A
lags behind the voltage in phase by 90o
B
leads the voltage in phase by 90o
C
is in the same phase with the voltage
D
leads the voltage by 180o
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 #27736)
Physics
UTME / JAMB 1997
Atomic, Quantum, Nuclear Physics & Electronics
One of the features of the fission process is that
A
its products are not radioactive
B
it leads to chain reaction
C
neutrons are not released
D
the sum of the masses of the reactants equals the sum of masses of the products
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 #27739)
Physics
UTME / JAMB 1997
Current Electricity & Electric Circuits
The graphite rods surrounding the uranium fuel rods in a nuclear reactor, are used to
A
absorb the neutrons and hence halt the nuclear process
B
create the neutrons and hence slow up the nuclear process
C
slowdown the neutrons and hence slow up the nuclear process
D
speed up the neutrons and hence speed up the nuclear process
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 #27741)
Physics
UTME / JAMB 1997
Calorimetry, Latent Heat & Change of State
What happens when a, certain quantity of pure ice is completely changed to water at 0oC?
A
latent heat is absorbed, the mass remains constant, and the volume decreases
B
latent heat is given out, the mass remains constant and the volume decreases
C
latent heat is given out, the mass increases and the volume remains constant
D
latent heat is absorbed, the mass decreases and the volume 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 #27695)
Physics
UTME / JAMB 1997
Current Electricity & Electric Circuits
The following are the scores of ten students in a test of 20 marks: 15, 16, 17, 13, 16, 8, 5, 16, 19, 17. What is the modal?
A
13
B
15
C
16
D
19
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 #30860)
Physics
UTME / JAMB 1997
Current Electricity & Electric Circuits
Solution
Find the standard deviation of the following data -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5
A
2
B
3
C
√10
D
√11
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
x = \(\frac{\sum x}{N}\) = \(\frac{0}{11}\)
= 0
\(\begin{array}{c|c} x & (x - x) & (x - x)^2\\ \hline -5 & -5 & 25 \\ -4 & -4 & 16\\-3 & -3 & 9\\ -2 & -2 & 4\\ -1 & -1 & 1\\ 0 & 0 & 0 \\1 & 1 & 1\\ 2 & 2 & 4 \\ 3 & 3 & 9 \\ 4 & 4 & 16\\ 5 & 5 & 25 \\ \hline & & 110\end{array}\)
S.D = \(\sqrt{\frac{\sum(x - x)^2}{\sum f}}\)
= \(\sqrt{\frac{110}{11}}\)
= \(\sqrt{10}\)
Source: Myschool Past Questions Archive (Record #30862)