Q. The unit of force in the SI system is derived from which of the following? (2023)
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A.
Mass and length
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B.
Mass, length, and time
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C.
Length and time
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D.
Mass and time
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)
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A.
Joule
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B.
Newton
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C.
Pascal
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D.
Watt
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)
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A.
Joule per second
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B.
Newton per meter
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C.
Watt per hour
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D.
Kilogram meter per second
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
Solution
The SI unit of power is the Watt (W).
Correct Answer: B — Watt
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Q. The unit of work is defined as one joule. What is one joule equivalent to? (2023)
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A.
One newton meter
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B.
One kilogram meter per second
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C.
One watt second
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D.
One pascal meter
Solution
One joule is defined as one newton meter (N·m).
Correct Answer: A — One newton meter
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Q. What is the base unit of mass in the SI system? (2019)
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A.
Gram
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B.
Kilogram
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C.
Pound
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D.
Ounce
Solution
The base unit of mass in the SI system is the kilogram (kg).
Correct Answer: B — Kilogram
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Q. What is the base unit of time in the SI system? (2019)
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A.
Minute
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B.
Hour
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C.
Second
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D.
Day
Solution
The base unit of time in the SI system is the second (s).
Correct Answer: C — Second
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Q. What is the dimension of energy? (2020)
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A.
M^1L^2T^-2
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B.
M^1L^1T^-1
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C.
M^0L^2T^-2
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D.
M^1L^0T^-1
Solution
The dimension of energy is M^1L^2T^-2.
Correct Answer: A — M^1L^2T^-2
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Q. What is the dimension of force? (2019)
-
A.
M^1L^1T^-2
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B.
M^1L^2T^-2
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C.
M^1L^0T^-2
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D.
M^0L^1T^-1
Solution
The dimension of force is M^1L^1T^-2.
Correct Answer: A — M^1L^1T^-2
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Q. What is the dimension of velocity? (2022)
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A.
M^1L^1T^-1
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B.
M^0L^1T^-1
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C.
M^1L^0T^-1
-
D.
M^1L^1T^0
Solution
Velocity is defined as displacement per unit time, hence its dimension is M^0L^1T^-1.
Correct Answer: B — M^0L^1T^-1
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Q. What is the dimension of work? (2022)
-
A.
M^1L^2T^-2
-
B.
M^1L^1T^-2
-
C.
M^0L^2T^-2
-
D.
M^1L^0T^-1
Solution
The dimension of work is M^1L^2T^-2.
Correct Answer: A — M^1L^2T^-2
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Q. What is the relationship between the units of pressure in SI? (2019)
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A.
1 Pa = 1 N/m²
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B.
1 Pa = 1 kg/m·s²
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C.
Both are correct
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D.
None of the above
Solution
Both statements are correct; 1 Pascal (Pa) is defined as 1 Newton per square meter.
Correct Answer: C — Both are correct
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Q. What is the unit of energy in the SI system? (2023)
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A.
Joule
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B.
Watt
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C.
Newton
-
D.
Pascal
Solution
The SI unit of energy is the Joule (J).
Correct Answer: A — Joule
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Q. What is the unit of pressure in SI units? (2023)
-
A.
Pascal
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B.
Bar
-
C.
Atmosphere
-
D.
Torr
Solution
The SI unit of pressure is Pascal (Pa), which is equivalent to N/m².
Correct Answer: A — Pascal
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Q. What is the unit of pressure in SI? (2023)
-
A.
Pascal
-
B.
Bar
-
C.
Atmosphere
-
D.
Torr
Solution
The SI unit of pressure is Pascal (Pa), which is equivalent to N/m².
Correct Answer: A — Pascal
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Q. Which of the following is a unit of frequency? (2023)
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A.
Hertz
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B.
Joule
-
C.
Newton
-
D.
Pascal
Solution
Hertz (Hz) is the unit of frequency, defined as cycles per second.
Correct Answer: A — Hertz
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Q. Which of the following is the correct dimension for pressure? (2021)
-
A.
M^1L^-1T^-2
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B.
M^1L^1T^-2
-
C.
M^1L^0T^-2
-
D.
M^0L^1T^-1
Solution
Pressure is defined as force per unit area, hence its dimension is M^1L^-1T^-2.
Correct Answer: A — M^1L^-1T^-2
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Q. Which of the following is the correct dimension for velocity? (2021)
-
A.
M^1L^1T^-1
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B.
M^0L^1T^-1
-
C.
M^1L^0T^-1
-
D.
M^1L^1T^0
Solution
The dimension of velocity is M^0L^1T^-1.
Correct Answer: B — M^0L^1T^-1
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Q. Which of the following is the correct representation of the unit of energy? (2019)
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A.
Joule
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B.
Newton-meter
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C.
Both A and B
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D.
None of the above
Solution
Both Joule and Newton-meter represent the same unit of energy.
Correct Answer: C — Both A and B
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Q. Which of the following is the correct unit for measuring frequency? (2022)
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A.
Hertz
-
B.
Joule
-
C.
Watt
-
D.
Newton
Solution
The unit for measuring frequency is Hertz (Hz).
Correct Answer: A — Hertz
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Q. Which of the following is the correct unit for measuring pressure? (2020)
-
A.
Pascal
-
B.
Joule
-
C.
Newton
-
D.
Watt
Solution
The SI unit for measuring pressure is Pascal (Pa).
Correct Answer: A — Pascal
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Q. Which of the following is the correct unit for pressure? (2020)
-
A.
Pascal
-
B.
Joule
-
C.
Newton
-
D.
Watt
Solution
The SI unit for pressure is Pascal (Pa), which is equivalent to N/m².
Correct Answer: A — Pascal
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Q. Which of the following quantities has dimensions of M^0L^2T^-2? (2021)
-
A.
Energy
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B.
Pressure
-
C.
Area
-
D.
Velocity
Solution
Area has dimensions of M^0L^2T^-2.
Correct Answer: C — Area
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Q. Which of the following quantities has no dimension? (2023)
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A.
Angle
-
B.
Force
-
C.
Velocity
-
D.
Acceleration
Solution
Angle is a dimensionless quantity.
Correct Answer: A — Angle
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Q. Which of the following quantities has the dimension M^0L^1T^-1? (2021)
-
A.
Velocity
-
B.
Acceleration
-
C.
Force
-
D.
Work
Solution
Velocity has the dimension M^0L^1T^-1.
Correct Answer: A — Velocity
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Q. Which of the following quantities has the dimension M^1L^2T^-2? (2019)
-
A.
Work
-
B.
Power
-
C.
Energy
-
D.
Force
Solution
Work has the dimension M^1L^2T^-2.
Correct Answer: A — Work
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Q. Which of the following units is used to measure electric current? (2021)
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A.
Volt
-
B.
Ohm
-
C.
Ampere
-
D.
Coulomb
Solution
The unit used to measure electric current is Ampere (A).
Correct Answer: C — Ampere
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