Q. In a nuclear reaction, what is the term for the energy released when a nucleus is formed from its constituent nucleons?
A.
Binding energy
B.
Kinetic energy
C.
Potential energy
D.
Thermal energy
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Solution
The energy released when a nucleus is formed from its constituent nucleons is called binding energy.
Correct Answer:
A
— Binding energy
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Q. In a nuclear reaction, what is the term for the energy released?
A.
Kinetic energy
B.
Potential energy
C.
Binding energy
D.
Nuclear energy
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Solution
The energy released in a nuclear reaction is referred to as nuclear energy, which is a result of changes in the binding energy of the nucleus.
Correct Answer:
D
— Nuclear energy
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Q. In a nuclear reaction, what is the term for the mass difference between the reactants and products?
A.
Mass defect
B.
Binding energy
C.
Nuclear fusion
D.
Nuclear fission
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Solution
The mass defect is the difference in mass between the reactants and products in a nuclear reaction, which is related to the binding energy.
Correct Answer:
A
— Mass defect
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Q. In a number system where '2' represents 10, what is the value of '4'?
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Solution
'4' in this system represents 20 in decimal since '2' is 10.
Correct Answer:
B
— 30
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Q. In a number system where 'A' represents 10, 'B' represents 11, and 'C' represents 12, what is the decimal equivalent of 'BAC'?
A.
186
B.
187
C.
188
D.
189
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Solution
'BAC' = 11*16^2 + 10*16^1 + 12*16^0 = 186 + 10 + 12 = 188.
Correct Answer:
B
— 187
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Q. In a number system where 'A' represents 10, 'B' represents 11, and 'C' represents 12, what is the decimal equivalent of 'BAA'?
A.
121
B.
122
C.
123
D.
124
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Solution
'BAA' = 11*100 + 10*10 + 10 = 121 + 20 + 10 = 121.
Correct Answer:
C
— 123
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Q. In a number system where 'B' represents 11, what is the value of 'B2' in decimal?
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Solution
'B2' = 11*5^1 + 2*5^0 = 55 + 2 = 57 in decimal.
Correct Answer:
C
— 21
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Q. In a number system, if '100' represents 4, what does '110' represent?
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Solution
'100' in base 4 is 4. '110' in base 4 is 1*16 + 1*4 + 0 = 20, which is 6.
Correct Answer:
B
— 6
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Q. In a number system, if 'C' represents 12, what is the value of 'C0' in decimal?
A.
120
B.
121
C.
122
D.
123
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Solution
'C0' = 12*10^1 + 0*10^0 = 120 in decimal.
Correct Answer:
A
— 120
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Q. In a number system, if the base is increased, what happens to the number of unique digits available?
A.
It decreases.
B.
It remains the same.
C.
It increases.
D.
It becomes zero.
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Solution
Increasing the base of a number system increases the number of unique digits available for representation.
Correct Answer:
C
— It increases.
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Q. In a numeral system where the base is 6, what is the value of '34'?
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Solution
'34' in base 6 is calculated as 3*6^1 + 4*6^0 = 18 + 4 = 22.
Correct Answer:
C
— 24
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Q. In a numeral system where the digits are 0, 1, 2, 3, and 4, what is the value of '34' in decimal?
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Solution
'34' in base 5 is calculated as 3*5^1 + 4*5^0 = 15 + 4 = 19.
Correct Answer:
C
— 16
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Q. In a numeral system, what does the term 'base' refer to? (2023)
A.
The number of unique digits used.
B.
The maximum value of a digit.
C.
The total number of digits in a number.
D.
The position of a digit in a number.
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Solution
The term 'base' refers to the number of unique digits used in a numeral system.
Correct Answer:
A
— The number of unique digits used.
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Q. In a numeral system, what does the term 'place value' refer to?
A.
The value of a digit based on its position.
B.
The total value of all digits combined.
C.
The maximum value a numeral can represent.
D.
The number of digits in a numeral.
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Solution
Place value refers to the value of a digit based on its position in a numeral.
Correct Answer:
A
— The value of a digit based on its position.
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Q. In a p-n junction diode, what happens when it is forward biased?
A.
Depletion region widens
B.
Current flows easily
C.
No current flows
D.
Reverse breakdown occurs
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Solution
When a p-n junction diode is forward biased, the depletion region narrows, allowing current to flow easily through the junction.
Correct Answer:
B
— Current flows easily
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Q. In a p-n junction diode, what happens when it is reverse-biased?
A.
Current flows freely
B.
Depletion region widens
C.
Holes move towards the n-side
D.
Electrons move towards the p-side
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Solution
When a p-n junction diode is reverse-biased, the depletion region widens, preventing current flow.
Correct Answer:
B
— Depletion region widens
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Q. In a p-n junction, what happens when the junction is forward biased? (2019)
A.
Depletion region widens
B.
Depletion region narrows
C.
No current flows
D.
Reverse current increases
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Solution
When a p-n junction is forward biased, the depletion region narrows, allowing current to flow.
Correct Answer:
B
— Depletion region narrows
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Q. In a p-n junction, what is formed at the junction region?
A.
Electric field
B.
Magnetic field
C.
Thermal field
D.
Gravitational field
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Solution
An electric field is formed at the p-n junction due to the diffusion of charge carriers.
Correct Answer:
A
— Electric field
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Q. In a p-n junction, what is the region called where no charge carriers are present?
A.
Depletion region
B.
Conduction band
C.
Valence band
D.
Neutral zone
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Solution
The depletion region is the area around the p-n junction where charge carriers are depleted, creating an electric field.
Correct Answer:
A
— Depletion region
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Q. In a p-n junction, what is the region called where no charge carriers exist?
A.
Depletion region
B.
Conduction band
C.
Valence band
D.
Neutral zone
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Solution
The depletion region is the area around the p-n junction where charge carriers have recombined, leaving behind immobile ions.
Correct Answer:
A
— Depletion region
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Q. In a p-n junction, which type of charge carriers are majority carriers in the p-type region? (2019)
A.
Electrons
B.
Holes
C.
Protons
D.
Neutrons
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Solution
In the p-type region of a p-n junction, holes are the majority charge carriers.
Correct Answer:
B
— Holes
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Q. In a p-n junction, which type of charge carriers are predominant in the p-type region? (2019)
A.
Electrons
B.
Holes
C.
Protons
D.
Neutrons
Show solution
Solution
In a p-type region, holes are the predominant charge carriers.
Correct Answer:
B
— Holes
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Q. In a painting competition, 3 out of 15 paintings were awarded prizes. What is the ratio of awarded paintings to total paintings?
A.
1:3
B.
1:5
C.
1:4
D.
1:6
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Solution
Ratio = 3 awarded / 15 total = 1:5.
Correct Answer:
B
— 1:5
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Q. In a painting competition, the first prize is awarded to 1 out of 10 participants. What is the probability of winning the first prize?
A.
1/10
B.
1/5
C.
1/2
D.
1/20
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Solution
Probability = 1 / 10.
Correct Answer:
A
— 1/10
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Q. In a pair of alternate exterior angles, if one angle measures 120 degrees, what is the measure of the other angle? (2021)
A.
60 degrees
B.
120 degrees
C.
180 degrees
D.
90 degrees
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Solution
Alternate exterior angles are equal when two parallel lines are cut by a transversal. Therefore, if one angle is 120 degrees, the other alternate exterior angle is also 120 degrees.
Correct Answer:
B
— 120 degrees
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Q. In a pair of complementary angles, if one angle measures 30 degrees, what is the measure of the other angle?
A.
50 degrees
B.
60 degrees
C.
70 degrees
D.
80 degrees
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Solution
Complementary angles sum up to 90 degrees. Therefore, the other angle = 90 - 30 = 60 degrees.
Correct Answer:
B
— 60 degrees
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Q. In a pair of intersecting lines, if one angle measures 35 degrees, what is the measure of the adjacent angle?
A.
145 degrees
B.
35 degrees
C.
180 degrees
D.
90 degrees
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Solution
Adjacent angles on a straight line are supplementary. Therefore, the adjacent angle measures 180 - 35 = 145 degrees.
Correct Answer:
A
— 145 degrees
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Q. In a pair of supplementary angles, if one angle measures 110 degrees, what is the measure of the other angle? (2021)
A.
70 degrees
B.
80 degrees
C.
90 degrees
D.
100 degrees
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Solution
Supplementary angles sum up to 180 degrees. Therefore, the other angle is 180 - 110 = 70 degrees.
Correct Answer:
A
— 70 degrees
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Q. In a pair of vertically opposite angles, if one angle measures 120 degrees, what is the measure of the other angle? (2021)
A.
60 degrees
B.
120 degrees
C.
180 degrees
D.
90 degrees
Show solution
Solution
Vertically opposite angles are equal. Therefore, if one angle measures 120 degrees, the other angle also measures 120 degrees.
Correct Answer:
B
— 120 degrees
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Q. In a parallel circuit with three resistors of 2Ω, 3Ω, and 6Ω, what is the equivalent resistance?
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Solution
The equivalent resistance for resistors in parallel is given by 1/R_eq = 1/R1 + 1/R2 + 1/R3. Thus, 1/R_eq = 1/2 + 1/3 + 1/6 = 1. Therefore, R_eq = 1Ω.
Correct Answer:
B
— 2Ω
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