Q. What is the frequency of a sound wave with a wavelength of 2 meters traveling at 340 m/s?
A.
170 Hz
B.
340 Hz
C.
680 Hz
D.
3400 Hz
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Solution
Frequency = Speed / Wavelength = 340 m/s / 2 m = 170 Hz.
Correct Answer: A — 170 Hz
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Q. What is the frequency of a tuning fork that vibrates 256 times in 2 seconds? (2019)
A.
128 Hz
B.
256 Hz
C.
512 Hz
D.
64 Hz
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Solution
Frequency (f) = Number of vibrations / Time = 256 / 2 = 128 Hz.
Correct Answer: A — 128 Hz
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Q. What is the frequency of a wave if its period is 0.01 seconds?
A.
100 Hz
B.
10 Hz
C.
1 Hz
D.
0.1 Hz
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Solution
Frequency is the reciprocal of the period. Therefore, frequency = 1/period = 1/0.01 = 100 Hz.
Correct Answer: A — 100 Hz
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Q. What is the frequency of a wave if its period is 0.02 seconds?
A.
50 Hz
B.
100 Hz
C.
200 Hz
D.
25 Hz
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Solution
Frequency f is the reciprocal of the period T, given by f = 1/T. Therefore, f = 1/0.02 s = 50 Hz.
Correct Answer: B — 100 Hz
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Q. What is the frequency of a wave if its wavelength is 2 meters and its speed is 340 m/s? (2021)
A.
170 Hz
B.
340 Hz
C.
68 Hz
D.
85 Hz
Show solution
Solution
Frequency (f) can be calculated using the formula f = v/λ. Here, f = 340 m/s / 2 m = 170 Hz.
Correct Answer: A — 170 Hz
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Q. What is the frequency of a wave if its wavelength is 2 meters and the speed of the wave is 340 m/s? (2020)
A.
170 Hz
B.
340 Hz
C.
85 Hz
D.
420 Hz
Show solution
Solution
Frequency (f) can be calculated using the formula f = v/λ. Here, f = 340 m/s / 2 m = 170 Hz.
Correct Answer: A — 170 Hz
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Q. What is the frequency of a wave if its wavelength is 2 meters and the speed of the wave is 10 m/s? (2022)
A.
2 Hz
B.
5 Hz
C.
10 Hz
D.
20 Hz
Show solution
Solution
Frequency (f) can be calculated using the formula f = v/λ. Here, f = 10 m/s / 2 m = 5 Hz.
Correct Answer: B — 5 Hz
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Q. What is the frequency of a wave with a period of 0.01 s? (2020)
A.
100 Hz
B.
50 Hz
C.
200 Hz
D.
10 Hz
Show solution
Solution
Frequency f = 1/T = 1/0.01 s = 100 Hz.
Correct Answer: A — 100 Hz
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Q. What is the frequency of a wave with a period of 0.01 seconds?
A.
100 Hz
B.
50 Hz
C.
200 Hz
D.
10 Hz
Show solution
Solution
Frequency f is the reciprocal of the period T. Therefore, f = 1/T = 1/0.01 s = 100 Hz.
Correct Answer: A — 100 Hz
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Q. What is the frequency of a wave with a period of 0.1 s? (2020)
A.
10 Hz
B.
5 Hz
C.
20 Hz
D.
15 Hz
Show solution
Solution
Frequency f = 1/T = 1/0.1 s = 10 Hz.
Correct Answer: A — 10 Hz
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Q. What is the frequency of a wave with a period of 0.2 seconds?
A.
5 Hz
B.
10 Hz
C.
20 Hz
D.
50 Hz
Show solution
Solution
Frequency (f) is the reciprocal of the period (T). Therefore, f = 1/T = 1/0.2 s = 5 Hz.
Correct Answer: B — 10 Hz
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Q. What is the frequency of a wave with a period of 0.5 seconds? (2019)
A.
2 Hz
B.
1 Hz
C.
0.5 Hz
D.
4 Hz
Show solution
Solution
Frequency (f) = 1/Period (T) = 1/0.5 s = 2 Hz.
Correct Answer: A — 2 Hz
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Q. What is the frequency of a wave with a speed of 300 m/s and a wavelength of 3 m? (2023)
A.
100 Hz
B.
150 Hz
C.
200 Hz
D.
250 Hz
Show solution
Solution
Frequency (f) = speed (v) / wavelength (λ) = 300 m/s / 3 m = 100 Hz.
Correct Answer: B — 150 Hz
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Q. What is the frequency of a wave with a wavelength of 2 m and a speed of 340 m/s?
A.
170 Hz
B.
340 Hz
C.
85 Hz
D.
420 Hz
Show solution
Solution
Frequency (f) is given by the formula f = speed / wavelength. Here, f = 340 m/s / 2 m = 170 Hz.
Correct Answer: A — 170 Hz
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Q. What is the frequency of a wave with a wavelength of 2 m traveling at a speed of 340 m/s?
A.
170 Hz
B.
340 Hz
C.
680 Hz
D.
85 Hz
Show solution
Solution
Frequency f = Speed / Wavelength = 340 m/s / 2 m = 170 Hz.
Correct Answer: A — 170 Hz
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Q. What is the frequency of an AC signal with a period of 0.02 seconds?
A.
50 Hz
B.
100 Hz
C.
25 Hz
D.
200 Hz
Show solution
Solution
Frequency (f) is the reciprocal of the period (T). Thus, f = 1/T = 1/0.02 s = 50 Hz.
Correct Answer: B — 100 Hz
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Q. What is the fringe width in a double-slit experiment if the wavelength of light is 500 nm, the distance between the slits is 0.2 mm, and the distance to the screen is 1 m?
A.
0.5 mm
B.
1 mm
C.
2 mm
D.
0.25 mm
Show solution
Solution
Fringe width β = λD/d = (500 x 10^-9 m)(1 m)/(0.2 x 10^-3 m) = 2.5 mm.
Correct Answer: A — 0.5 mm
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Q. What is the function of a capacitor in an electric circuit? (2022)
A.
Store energy
B.
Increase current
C.
Decrease voltage
D.
Convert AC to DC
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Solution
A capacitor is used to store electrical energy in an electric field, which can be released when needed.
Correct Answer: A — Store energy
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Q. What is the function of a diode in a circuit? (2020)
A.
To store energy
B.
To amplify signals
C.
To allow current to flow in one direction
D.
To resist current flow
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Solution
A diode allows current to flow in one direction only, acting as a one-way valve for electric current.
Correct Answer: C — To allow current to flow in one direction
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Q. What is the function of a file system in an operating system?
A.
To manage memory
B.
To manage files
C.
To manage processes
D.
To manage users
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Solution
The file system manages files within the operating system.
Correct Answer: B — To manage files
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Q. What is the function of a firewall in internet security? (2023)
A.
To speed up internet connection
B.
To block unauthorized access
C.
To store data
D.
To manage email accounts
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Solution
A firewall is used to block unauthorized access to or from a private network, enhancing internet security.
Correct Answer: B — To block unauthorized access
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Q. What is the function of a power supply unit (PSU) in a computer?
A.
Store data
B.
Provide power
C.
Cool the system
D.
Connect peripherals
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Solution
The power supply unit (PSU) provides power to all components of the computer.
Correct Answer: B — Provide power
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Q. What is the function of a promoter in a gene? (2023)
A.
To enhance gene expression
B.
To initiate transcription
C.
To terminate transcription
D.
To bind to ribosomes
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Solution
A promoter is a DNA sequence that initiates transcription of a gene by providing a binding site for RNA polymerase.
Correct Answer: B — To initiate transcription
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Q. What is the function of a promoter in a recombinant DNA molecule? (2023)
A.
To initiate transcription
B.
To terminate transcription
C.
To enhance translation
D.
To degrade RNA
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Solution
A promoter is a DNA sequence that initiates transcription of a particular gene, allowing for gene expression.
Correct Answer: A — To initiate transcription
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Q. What is the function of a selectable marker in a cloning vector? (2023)
A.
To enhance gene expression
B.
To allow for the identification of successfully transformed cells
C.
To provide energy for the cell
D.
To stabilize the DNA
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Solution
Selectable markers are genes that confer resistance to antibiotics or other substances, allowing for the identification of cells that have successfully taken up the vector.
Correct Answer: B — To allow for the identification of successfully transformed cells
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Q. What is the function of a transistor in a circuit? (2021)
A.
Amplification
B.
Rectification
C.
Capacitance
D.
Inductance
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Solution
A transistor is primarily used for amplification of signals in electronic circuits.
Correct Answer: A — Amplification
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Q. What is the function of an email client?
A.
To host websites
B.
To send and receive emails
C.
To create web pages
D.
To manage databases
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Solution
An email client is software used to send and receive emails.
Correct Answer: B — To send and receive emails
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Q. What is the function of bile in digestion? (2022)
A.
Breaks down proteins
B.
Emulsifies fats
C.
Digests carbohydrates
D.
Absorbs vitamins
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Solution
Bile emulsifies fats, making them easier to digest by lipases.
Correct Answer: B — Emulsifies fats
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Q. What is the function of cartilage in the body? (2022)
A.
Support and flexibility
B.
Storage of fat
C.
Transmission of impulses
D.
Protection
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Solution
Cartilage provides support and flexibility in the body.
Correct Answer: A — Support and flexibility
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Q. What is the function of chlorophyll in plants? (2022)
A.
Absorbing water
B.
Absorbing sunlight
C.
Transporting nutrients
D.
Storing energy
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Solution
Chlorophyll is the pigment in plants that absorbs sunlight, which is essential for photosynthesis.
Correct Answer: B — Absorbing sunlight
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