Q. In analyzing the mixed graph, which of the following terms best describes the relationship between the two datasets? (2023)
-
A.
Causation
-
B.
Correlation
-
C.
Contradiction
-
D.
Comparison
Solution
The graph indicates a correlation between the two datasets rather than causation.
Correct Answer:
B
— Correlation
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Q. In analyzing the mixed graph, which of the following vocabulary terms best describes the overall trend?
-
A.
Diminishing
-
B.
Exponential
-
C.
Cyclical
-
D.
Linear
Solution
If the graph shows rapid increases, 'exponential' is the most appropriate term to describe the trend.
Correct Answer:
B
— Exponential
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Q. In analyzing the mixed graph, which statement is most accurate regarding the x-axis variable? (2023)
-
A.
It is the dependent variable.
-
B.
It shows a time progression.
-
C.
It is irrelevant to the analysis.
-
D.
It is the independent variable.
Solution
Typically, the x-axis represents the independent variable in a graph.
Correct Answer:
D
— It is the independent variable.
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Q. In angiosperms, the ovary develops into which of the following structures? (2023)
-
A.
Seed
-
B.
Fruit
-
C.
Flower
-
D.
Leaf
Solution
In angiosperms, the ovary develops into a fruit, which contains the seeds.
Correct Answer:
B
— Fruit
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Q. In beta decay, which particle is emitted from the nucleus?
-
A.
Alpha particle
-
B.
Beta particle
-
C.
Gamma ray
-
D.
Neutron
Solution
In beta decay, a beta particle (which is an electron or positron) is emitted from the nucleus.
Correct Answer:
B
— Beta particle
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Q. In binary, what is the decimal number 10?
-
A.
1010
-
B.
1001
-
C.
1100
-
D.
1110
Solution
The decimal number 10 is represented as 1010 in binary.
Correct Answer:
A
— 1010
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Q. In Biot-Savart Law, what does the term 'dL' represent?
-
A.
Element of current
-
B.
Element of length
-
C.
Element of magnetic field
-
D.
Element of charge
Solution
In Biot-Savart Law, 'dL' represents an infinitesimal element of length along the current-carrying conductor.
Correct Answer:
B
— Element of length
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Q. In constraint-based distribution, what is meant by 'degrees of freedom'? (2019)
-
A.
The number of independent movements allowed
-
B.
The total energy in the system
-
C.
The mass of the objects involved
-
D.
The speed of the system
Solution
Degrees of freedom refer to the number of independent movements or parameters that can vary in a system.
Correct Answer:
A
— The number of independent movements allowed
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Q. In converting the decimal number 255 to hexadecimal, what is the result?
Solution
The decimal number 255 is represented as FF in hexadecimal.
Correct Answer:
A
— FF
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Q. In converting the hexadecimal number 'A3' to decimal, what is the resulting value?
-
A.
163
-
B.
1632
-
C.
123
-
D.
103
Solution
The hexadecimal number 'A3' converts to decimal as follows: A (10)*16^1 + 3*16^0 = 160 + 3 = 163.
Correct Answer:
A
— 163
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Q. In converting the hexadecimal number 1A to decimal, what is the result?
Solution
The hexadecimal number 1A converts to decimal as 1*16^1 + 10*16^0 = 26.
Correct Answer:
A
— 26
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Q. In coordinate geometry, what is the slope of a line passing through the points (2, 3) and (4, 7)?
Solution
The slope (m) is calculated as (y2 - y1) / (x2 - x1) = (7 - 3) / (4 - 2) = 4 / 2 = 2.
Correct Answer:
A
— 2
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Q. In digital communication, what does the term 'bit rate' refer to?
-
A.
The number of bits transmitted per second
-
B.
The number of bits stored in a device
-
C.
The number of bits in a signal
-
D.
The number of bits required for modulation
Solution
Bit rate is defined as the number of bits transmitted per second in a digital communication system.
Correct Answer:
A
— The number of bits transmitted per second
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Q. In double-slit diffraction, what is the effect of increasing the distance between the slits on the fringe width?
-
A.
Fringe width increases
-
B.
Fringe width decreases
-
C.
Fringe width remains constant
-
D.
Fringe width becomes zero
Solution
Increasing the distance between the slits increases the fringe width because the angle of diffraction increases.
Correct Answer:
A
— Fringe width increases
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Q. In double-slit diffraction, what is the path difference for constructive interference at the first order maximum?
Solution
For constructive interference, the path difference must be an integer multiple of the wavelength, so for the first order maximum, it is λ.
Correct Answer:
B
— λ
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Q. In ecological succession, what is the term for the first species to colonize a barren environment? (2022)
-
A.
Pioneer species
-
B.
Climax community
-
C.
Keystone species
-
D.
Invasive species
Solution
Pioneer species are the first organisms to colonize previously uninhabited or disturbed environments.
Correct Answer:
A
— Pioneer species
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Q. In electrochemistry, what does the term 'reduction' refer to?
-
A.
Loss of electrons
-
B.
Gain of electrons
-
C.
Loss of protons
-
D.
Gain of protons
Solution
Reduction refers to the gain of electrons in a chemical reaction.
Correct Answer:
B
— Gain of electrons
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Q. In electrolysis, if 1 mole of electrons is transferred, how many grams of copper can be deposited from Cu²⁺?
-
A.
63.5 g
-
B.
31.75 g
-
C.
127 g
-
D.
159 g
Solution
1 mole of Cu²⁺ deposits 63.5 g of copper.
Correct Answer:
A
— 63.5 g
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Q. In electrolysis, if the current is 2 A and the time is 30 minutes, how many moles of electrons are transferred?
-
A.
0.1 mol
-
B.
0.2 mol
-
C.
0.3 mol
-
D.
0.4 mol
Solution
Using the formula: moles = (current × time) / (n × F), where n=1 for electrons and F=96500 C/mol.
Correct Answer:
B
— 0.2 mol
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Q. In electrolysis, the process of oxidation occurs at the: (2023)
-
A.
Anode
-
B.
Cathode
-
C.
Electrolyte
-
D.
None of the above
Solution
In electrolysis, oxidation occurs at the anode.
Correct Answer:
A
— Anode
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Q. In electrolysis, the process of oxidation occurs at the: (2023) 2023
-
A.
Anode
-
B.
Cathode
-
C.
Electrolyte
-
D.
None of the above
Solution
In electrolysis, oxidation occurs at the anode.
Correct Answer:
A
— Anode
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Q. In electrolysis, the process of oxidation occurs at which electrode? (2019)
-
A.
Anode
-
B.
Cathode
-
C.
Both electrodes
-
D.
None of the above
Solution
In electrolysis, oxidation occurs at the anode.
Correct Answer:
A
— Anode
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Q. In electrolysis, what is produced at the anode when NaCl solution is electrolyzed? (2022)
-
A.
Hydrogen gas
-
B.
Chlorine gas
-
C.
Sodium metal
-
D.
Oxygen gas
Solution
Chlorine gas is produced at the anode during the electrolysis of NaCl solution.
Correct Answer:
B
— Chlorine gas
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Q. In electromagnetic induction, what is the role of the changing magnetic field?
-
A.
It creates a static electric field
-
B.
It induces a current in a conductor
-
C.
It has no effect
-
D.
It increases resistance
Solution
A changing magnetic field induces an electromotive force (EMF) in a conductor, leading to the flow of current.
Correct Answer:
B
— It induces a current in a conductor
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Q. In electrostatics, what is the significance of equipotential surfaces?
-
A.
They are surfaces where electric field is zero
-
B.
They are surfaces where potential is constant
-
C.
They are surfaces where charge density is uniform
-
D.
They are surfaces where current flows
Solution
Equipotential surfaces are defined as surfaces where the electric potential is constant. No work is done when moving a charge along these surfaces.
Correct Answer:
B
— They are surfaces where potential is constant
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Q. In Excel, how do you create a chart from selected data?
-
A.
Insert > Chart
-
B.
Data > Chart
-
C.
Home > Chart
-
D.
View > Chart
Solution
You create a chart from selected data by going to Insert > Chart in Excel.
Correct Answer:
A
— Insert > Chart
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Q. In Excel, if you have the formula =SUM(A1:A10), what does it do?
-
A.
Counts the number of cells
-
B.
Calculates the average
-
C.
Adds up the values from A1 to A10
-
D.
Finds the maximum value
Solution
The formula =SUM(A1:A10) adds up the values from cells A1 to A10.
Correct Answer:
C
— Adds up the values from A1 to A10
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Q. In Excel, if you want to sum the values in cells A1 to A10, which formula would you use?
-
A.
=SUM(A1:A10)
-
B.
=ADD(A1:A10)
-
C.
=TOTAL(A1:A10)
-
D.
=SUMM(A1:A10)
Solution
The correct formula to sum the values in cells A1 to A10 in Excel is =SUM(A1:A10).
Correct Answer:
A
— =SUM(A1:A10)
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Q. In Excel, what does the function =AVERAGE(B1:B10) calculate?
-
A.
Sum of B1 to B10
-
B.
Count of B1 to B10
-
C.
Average of B1 to B10
-
D.
Maximum of B1 to B10
Solution
The function =AVERAGE(B1:B10) calculates the average of the values in cells B1 to B10.
Correct Answer:
C
— Average of B1 to B10
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Q. In Excel, what does the VLOOKUP function do? (2023)
-
A.
Looks up a value vertically
-
B.
Calculates the average
-
C.
Counts the number of cells
-
D.
Finds the maximum value
Solution
The VLOOKUP function in Excel is used to look up a value vertically in a table.
Correct Answer:
A
— Looks up a value vertically
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