Q. The unit cell of a diamond structure is best described as which of the following? (2020)
A.
Simple cubic
B.
Face-centered cubic
C.
Body-centered cubic
D.
Hexagonal
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Solution
The diamond structure can be described 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. The unit of electric charge in SI is?
A.
Coulomb
B.
Ampere
C.
Volt
D.
Ohm
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Solution
The SI unit of electric charge is Coulomb (C).
Correct Answer: A — Coulomb
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Q. The unit of electric charge in the SI system is: (2022)
A.
Coulomb
B.
Ampere
C.
Volt
D.
Ohm
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Solution
Coulomb (C) is the SI unit of electric charge.
Correct Answer: A — Coulomb
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Q. The unit of electric current is _____. (2019)
A.
Volt
B.
Ohm
C.
Ampere
D.
Watt
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Solution
The unit of electric current is the Ampere, which measures the flow of electric charge.
Correct Answer: C — Ampere
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Q. The unit of energy in the CGS system is: (2020)
A.
Joule
B.
Erg
C.
Calorie
D.
Watt
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Solution
In the CGS system, the unit of energy is Erg, where 1 Joule = 10^7 Ergs.
Correct Answer: B — Erg
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Q. The unit of energy in the SI system is equivalent to which of the following? (2020)
A.
Joule
B.
Newton-meter
C.
Both A and B
D.
None of the above
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Solution
Energy is measured in Joules, and 1 Joule is defined as 1 Newton-meter, hence both A and B are correct.
Correct Answer: C — Both A and B
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Q. The unit of energy in the SI system is:
A.
Joule
B.
Calorie
C.
Watt
D.
Newton
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Solution
The SI unit of energy is Joule (J).
Correct Answer: A — Joule
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Q. The unit of force in the SI system is derived from which of the following? (2023)
A.
Mass and length
B.
Mass, length, and time
C.
Length and time
D.
Mass and time
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Solution
The unit of force (Newton) is derived from mass, length, and time: kg·m/s².
Correct Answer: B — Mass, length, and time
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Q. The unit of force in the SI system is: (2023)
A.
Joule
B.
Newton
C.
Pascal
D.
Watt
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Solution
The SI unit of force is the Newton (N).
Correct Answer: B — Newton
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Q. The unit of power in the SI system is defined as: (2023)
A.
Joule per second
B.
Newton per meter
C.
Watt per hour
D.
Kilogram meter per second
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Solution
The SI unit of power is defined as Joule per second (Watt).
Correct Answer: A — Joule per second
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Q. The unit of power in the SI system is: (2023)
A.
Joule
B.
Watt
C.
Newton
D.
Pascal
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Solution
The SI unit of power is the Watt (W).
Correct Answer: B — Watt
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Q. The unit of pressure in SI is:
A.
Pascal
B.
Bar
C.
Torr
D.
Atmosphere
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Solution
The SI unit of pressure is Pascal (Pa), defined as one newton per square meter (N/m²).
Correct Answer: A — Pascal
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Q. The unit of pressure in the SI system is:
A.
Pascal
B.
Bar
C.
Torr
D.
Atmosphere
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Solution
The SI unit of pressure is Pascal (Pa), defined as one newton per square meter (N/m²).
Correct Answer: A — Pascal
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Q. The unit of work is defined as one joule. What is one joule equivalent to? (2023)
A.
One newton meter
B.
One kilogram meter per second
C.
One watt second
D.
One pascal meter
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Solution
One joule is defined as one newton meter (N·m).
Correct Answer: A — One newton meter
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Q. The United Nations Framework Convention on Climate Change (UNFCCC) was established in which year? (1992)
A.
1992
B.
1997
C.
2000
D.
2005
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Solution
The United Nations Framework Convention on Climate Change (UNFCCC) was established in 1992 during the Earth Summit in Rio de Janeiro.
Correct Answer: A — 1992
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Q. The United Nations was founded in which year? (1945)
A.
1945
B.
1950
C.
1960
D.
1975
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Solution
The United Nations was founded in 1945 after World War II to promote peace and cooperation among countries.
Correct Answer: A — 1945
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Q. The Universal Declaration of Human Rights was adopted by the United Nations in which year? (1948)
A.
1945
B.
1948
C.
1950
D.
1966
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Solution
The Universal Declaration of Human Rights was adopted by the United Nations General Assembly on December 10, 1948.
Correct Answer: B — 1948
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Q. The use of 'flying buttresses' in architecture was primarily developed during which period?
A.
Ancient
B.
Medieval
C.
Renaissance
D.
Modern
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Solution
Flying buttresses were primarily developed during the Medieval period, particularly in Gothic architecture, to support the walls of cathedrals.
Correct Answer: B — Medieval
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Q. The use of perspective in painting was significantly developed during which period?
A.
Medieval
B.
Renaissance
C.
Baroque
D.
Modern
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Solution
The Renaissance period saw the significant development of perspective in painting, allowing artists to create a sense of depth and realism in their works.
Correct Answer: B — Renaissance
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Q. The value of (1 + i)^2 is?
A.
2i
B.
2
C.
0
D.
1 + 2i
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Solution
(1 + i)^2 = 1^2 + 2(1)(i) + i^2 = 1 + 2i - 1 = 2.
Correct Answer: B — 2
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Q. The value of (x^2)^3 is equal to?
A.
x^5
B.
x^6
C.
x^7
D.
x^8
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Solution
Using the power of a power property, (a^m)^n = a^(m*n), we get (x^2)^3 = x^(2*3) = x^6.
Correct Answer: B — x^6
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Q. The value of cos(tan^(-1)(x)) is:
A.
1/√(1+x^2)
B.
x/√(1+x^2)
C.
√(1+x^2)/x
D.
0
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Solution
Using the right triangle definition, cos(tan^(-1)(x)) = adjacent/hypotenuse = 1/√(1+x^2).
Correct Answer: A — 1/√(1+x^2)
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Q. The value of log2(32) is?
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Solution
Since 32 = 2^5, log2(32) = 5.
Correct Answer: B — 5
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Q. The value of log_2(32) is?
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Solution
Since 32 = 2^5, log_2(32) = 5.
Correct Answer: B — 5
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Q. The value of sin(tan^(-1)(x)) is:
A.
x/√(1+x^2)
B.
√(1-x^2)
C.
1/√(1+x^2)
D.
x
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Solution
Using the right triangle definition, sin(tan^(-1)(x)) = opposite/hypotenuse = x/√(1+x^2).
Correct Answer: A — x/√(1+x^2)
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Q. The value of sin^(-1)(-1) is:
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Solution
sin^(-1)(-1) corresponds to the angle whose sine is -1, which is -π/2.
Correct Answer: A — -π/2
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Q. The value of sin^(-1)(sin(π/4)) is:
A.
π/4
B.
3π/4
C.
0
D.
π/2
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Solution
Since π/4 is in the range of sin^(-1), sin^(-1)(sin(π/4)) = π/4.
Correct Answer: A — π/4
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Q. The value of sin^(-1)(√3/2) is:
A.
π/3
B.
π/6
C.
π/4
D.
π/2
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Solution
sin^(-1)(√3/2) corresponds to the angle whose sine is √3/2, which is π/3.
Correct Answer: A — π/3
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Q. The value of tan^(-1)(√3) is:
A.
π/3
B.
π/4
C.
π/6
D.
π/2
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Solution
tan^(-1)(√3) corresponds to the angle whose tangent is √3, which is π/3.
Correct Answer: A — π/3
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Q. The vertex of the parabola given by the equation y = 2x^2 - 4x + 1 is located at which point?
A.
(1, -1)
B.
(2, 0)
C.
(1, 0)
D.
(0, 1)
Show solution
Solution
To find the vertex, use the formula x = -b/(2a). Here, a = 2, b = -4, so x = 1. Plugging x = 1 into the equation gives y = -1.
Correct Answer: A — (1, -1)
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