Q. What is the truth value of the expression A AND (B OR C) when A = 1, B = 0, C = 1?
-
A.
0
-
B.
1
-
C.
2
-
D.
Undefined
Solution
B OR C = 0 OR 1 = 1. Then, A AND 1 = 1 AND 1 = 1.
Correct Answer:
B
— 1
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Q. What is the Tyndall effect? (2023)
-
A.
Scattering of light by particles
-
B.
Absorption of light by particles
-
C.
Reflection of light by particles
-
D.
Refraction of light by particles
Solution
The Tyndall effect is the scattering of light by colloidal particles, making the path of the light visible.
Correct Answer:
A
— Scattering of light by particles
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Q. What is the typical band gap of germanium?
-
A.
0.66 eV
-
B.
1.1 eV
-
C.
1.5 eV
-
D.
2.0 eV
Solution
The typical band gap of germanium is approximately 0.66 eV.
Correct Answer:
A
— 0.66 eV
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Q. What is the typical charge of s-block metal ions?
Solution
S-block metals typically form ions with a charge of +2.
Correct Answer:
B
— +2
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Q. What is the typical current-voltage characteristic of a diode in reverse bias? (2019)
-
A.
Linear
-
B.
Exponential
-
C.
Constant
-
D.
Very small reverse saturation current
Solution
In reverse bias, a diode exhibits a very small reverse saturation current until breakdown occurs.
Correct Answer:
D
— Very small reverse saturation current
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Q. What is the typical forward voltage drop across a silicon diode? (2023)
-
A.
0.2 V
-
B.
0.7 V
-
C.
1.5 V
-
D.
2.0 V
Solution
The typical forward voltage drop across a silicon diode is approximately 0.7 V.
Correct Answer:
B
— 0.7 V
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Q. What is the typical range of energy band gaps for semiconductors?
-
A.
0.1 - 0.5 eV
-
B.
0.5 - 1.5 eV
-
C.
1.5 - 3.0 eV
-
D.
3.0 - 5.0 eV
Solution
The typical range of energy band gaps for semiconductors is between 0.5 eV and 1.5 eV.
Correct Answer:
B
— 0.5 - 1.5 eV
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Q. What is the typical range of the energy band gap for semiconductors?
-
A.
0.1 - 0.5 eV
-
B.
0.5 - 2.5 eV
-
C.
2.5 - 5 eV
-
D.
5 - 10 eV
Solution
The typical range of the energy band gap for semiconductors is between 0.5 eV and 2.5 eV.
Correct Answer:
B
— 0.5 - 2.5 eV
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Q. What is the uncertainty in a measurement of 50.0 ± 0.5 g when converted to kilograms?
-
A.
0.0005 kg
-
B.
0.005 kg
-
C.
0.05 kg
-
D.
0.5 kg
Solution
To convert grams to kilograms, divide by 1000. The uncertainty in kilograms is 0.5 g / 1000 = 0.0005 kg.
Correct Answer:
B
— 0.005 kg
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Q. What is the uncertainty in position if the uncertainty in momentum of a particle is 1.0 x 10^-24 kg m/s?
-
A.
1.0 x 10^-10 m
-
B.
6.63 x 10^-10 m
-
C.
1.0 x 10^-34 m
-
D.
6.63 x 10^-34 m
Solution
Using Heisenberg's uncertainty principle, ΔxΔp ≥ ħ/2, we find Δx ≥ ħ/(2Δp) = (1.055 x 10^-34)/(2 x 1.0 x 10^-24) = 5.27 x 10^-11 m.
Correct Answer:
D
— 6.63 x 10^-34 m
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Q. What is the uncertainty in the measurement of a length of 5.00 cm ± 0.02 cm when calculating the area?
-
A.
0.04 cm²
-
B.
0.10 cm²
-
C.
0.20 cm²
-
D.
0.50 cm²
Solution
Area = length² = (5.00 cm)² = 25.00 cm². The uncertainty in area is calculated using the formula: ΔA = 2LΔL = 2(5.00 cm)(0.02 cm) = 0.20 cm².
Correct Answer:
B
— 0.10 cm²
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Q. What is the uncertainty in the result of adding 5.0 cm and 3.0 cm, each with an uncertainty of 0.1 cm?
-
A.
0.1 cm
-
B.
0.2 cm
-
C.
0.3 cm
-
D.
0.4 cm
Solution
When adding, the uncertainties are added: 0.1 cm + 0.1 cm = 0.2 cm.
Correct Answer:
B
— 0.2 cm
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Q. What is the uncertainty principle formulated by Heisenberg?
-
A.
ΔxΔp ≥ ħ/2
-
B.
ΔEΔt ≥ ħ
-
C.
ΔxΔE ≥ ħ
-
D.
ΔpΔt ≥ ħ
Solution
The uncertainty principle states that the product of the uncertainties in position (Δx) and momentum (Δp) is greater than or equal to ħ/2.
Correct Answer:
A
— ΔxΔp ≥ ħ/2
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Q. What is the uncertainty principle in quantum mechanics?
-
A.
ΔxΔp ≥ ħ/2
-
B.
ΔEΔt ≥ ħ/2
-
C.
Both A and B
-
D.
None of the above
Solution
The uncertainty principle states that ΔxΔp ≥ ħ/2 and ΔEΔt ≥ ħ/2, where ħ is the reduced Planck's constant.
Correct Answer:
C
— Both A and B
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Q. What is the underlying message of the passage about consumerism? (2023)
-
A.
It promotes excessive spending
-
B.
It encourages minimalism
-
C.
It critiques societal values
-
D.
It supports economic growth
Solution
The passage critiques societal values related to consumerism, suggesting it leads to negative consequences.
Correct Answer:
C
— It critiques societal values
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Q. What is the underlying message of the passage regarding consumerism?
-
A.
It is beneficial for society
-
B.
It leads to environmental degradation
-
C.
It fosters innovation
-
D.
It is a personal choice
Solution
The passage conveys that consumerism has detrimental effects on the environment.
Correct Answer:
B
— It leads to environmental degradation
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Q. What is the union of the sets I = {1, 2} and J = {2, 3}?
-
A.
{1, 2, 3}
-
B.
{1, 2}
-
C.
{2, 3}
-
D.
{1, 2, 2, 3}
Solution
The union of two sets includes all unique elements from both sets. Thus, I ∪ J = {1, 2, 3}.
Correct Answer:
A
— {1, 2, 3}
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Q. What is the union of the sets {1, 2} and {2, 3}?
-
A.
{1, 2}
-
B.
{1, 2, 3}
-
C.
{2, 3}
-
D.
{1, 2, 2, 3}
Solution
The union of two sets includes all elements from both sets without duplicates. Thus, {1, 2} ∪ {2, 3} = {1, 2, 3}.
Correct Answer:
B
— {1, 2, 3}
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Q. What is the union of the sets {a, b} and {b, c}?
-
A.
{a, b}
-
B.
{a, b, c}
-
C.
{b, c}
-
D.
{a, c}
Solution
The union of two sets is the set of elements that are in either set. Here, {a, b} ∪ {b, c} = {a, b, c}.
Correct Answer:
B
— {a, b, c}
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Q. What is the unit cell of a diamond structure? (2022)
-
A.
Face-centered cubic
-
B.
Body-centered cubic
-
C.
Simple cubic
-
D.
Hexagonal
Solution
The diamond structure is based on a face-centered cubic (FCC) unit cell with a specific arrangement of carbon atoms.
Correct Answer:
A
— Face-centered cubic
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Q. What is the unit cell of diamond classified as? (2022)
-
A.
Simple cubic
-
B.
Face-centered cubic
-
C.
Body-centered cubic
-
D.
Cubic close-packed
Solution
The diamond structure is classified as a face-centered cubic (FCC) lattice with a basis of two carbon atoms.
Correct Answer:
B
— Face-centered cubic
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Q. What is the unit cell of diamond? (2022)
-
A.
Face-centered cubic
-
B.
Body-centered cubic
-
C.
Simple cubic
-
D.
Hexagonal
Solution
Diamond has a face-centered cubic (FCC) structure with a complex arrangement of carbon atoms.
Correct Answer:
A
— Face-centered cubic
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Q. What is the unit of angular momentum in the SI system?
-
A.
kg·m/s
-
B.
kg·m^2/s
-
C.
kg·m^2/s^2
-
D.
Joule
Solution
The unit of angular momentum is kg·m^2/s.
Correct Answer:
B
— kg·m^2/s
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Q. What is the unit of capacitance?
-
A.
Farad
-
B.
Coulomb
-
C.
Volt
-
D.
Ohm
Solution
The unit of capacitance is the Farad (F), which is defined as one coulomb per volt.
Correct Answer:
A
— Farad
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Q. What is the unit of electric charge in the SI system? (2019)
-
A.
Coulomb
-
B.
Ampere
-
C.
Volt
-
D.
Ohm
Solution
The unit of electric charge is Coulomb (C).
Correct Answer:
A
— Coulomb
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Q. What is the unit of electric charge?
-
A.
Volt
-
B.
Ampere
-
C.
Coulomb
-
D.
Ohm
Solution
The unit of electric charge is the Coulomb.
Correct Answer:
C
— Coulomb
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Q. What is the unit of electric current?
-
A.
Volt
-
B.
Ohm
-
C.
Ampere
-
D.
Coulomb
Solution
The unit of electric current is Ampere (A).
Correct Answer:
C
— Ampere
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Q. What is the unit of electric field strength?
-
A.
Volt per meter
-
B.
Coulomb per meter
-
C.
Newton per coulomb
-
D.
Joule per coulomb
Solution
The electric field strength is defined as the force per unit charge, which is measured in volts per meter (V/m).
Correct Answer:
A
— Volt per meter
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Q. What is the unit of electric field?
-
A.
Volt
-
B.
Newton/Coulomb
-
C.
Coulomb
-
D.
Joule
Solution
The electric field is defined as the force per unit charge, hence its unit is Newton per Coulomb (N/C).
Correct Answer:
B
— Newton/Coulomb
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Q. What is the unit of electric potential?
-
A.
Coulomb
-
B.
Volt
-
C.
Joule
-
D.
Newton
Solution
The unit of electric potential is the Volt (V), which is defined as one Joule per Coulomb.
Correct Answer:
B
— Volt
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