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Test: Unit & Measurement - UPSC MCQ


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10 Questions MCQ Test - Test: Unit & Measurement

Test: Unit & Measurement for UPSC 2024 is part of UPSC preparation. The Test: Unit & Measurement questions and answers have been prepared according to the UPSC exam syllabus.The Test: Unit & Measurement MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Unit & Measurement below.
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Test: Unit & Measurement - Question 1
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What is the fundamental quantity associated with the base unit "ampere"?

Detailed Solution for Test: Unit & Measurement - Question 1
The base unit "ampere" is associated with the fundamental quantity of electric current. It represents the flow of electric charge in a circuit. In simpler terms, it measures how many electrons pass through a conductor per second. Electric current is measured in amperes (A).
Test: Unit & Measurement - Question 2
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In the SI system, which base quantity is associated with the unit "kelvin"?

Detailed Solution for Test: Unit & Measurement - Question 2
The SI unit "kelvin" (K) is associated with the base quantity of temperature. Kelvin is the standard unit for measuring temperature in the SI system, and it is based on the thermodynamic temperature of the triple point of water.
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Test: Unit & Measurement - Question 3
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What is the SI base unit for measuring luminous intensity?

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The SI base unit for measuring luminous intensity is the candela (cd). Candela is used to quantify the brightness or intensity of light emitted by a source. It's essential for applications like lighting and optics.
Test: Unit & Measurement - Question 4
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Which system of units was used internationally for scientific, technical, industrial, and commercial work after being recommended by the General Conference on Weights and Measures in 1971?
Detailed Solution for Test: Unit & Measurement - Question 4
The internationally accepted system of units for measurement is the SI (Système International), which was recommended by the General Conference on Weights and Measures in 1971. It is used for various scientific, technical, industrial, and commercial purposes worldwide.
Test: Unit & Measurement - Question 5
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What is the distance equivalent to a parsec (Parallactic second) in terms of light years?
Detailed Solution for Test: Unit & Measurement - Question 5
A parsec (Parallactic second) is equivalent to 3.26 light years. This unit is commonly used in astronomy to measure vast interstellar distances.
Test: Unit & Measurement - Question 6
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Which SI base unit is defined as the amount of substance containing as many entities as there are atoms in 0.012 kg of carbon-12?
Detailed Solution for Test: Unit & Measurement - Question 6
The SI base unit "mole" (mol) is defined as the amount of substance that contains the same number of entities (such as atoms or molecules) as there are atoms in 0.012 kg of carbon-12. This unit is crucial in chemistry for quantifying amounts of substances.
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Which SI base unit is defined by the time taken by 9,192,631,770 periods of oscillations of light emitted by cesium-133 atoms?
Detailed Solution for Test: Unit & Measurement - Question 7
The SI base unit "second" (s) is defined by the time taken for 9,192,631,770 periods of oscillations of light emitted by cesium-133 atoms. This definition ensures highly precise time measurements and is used in atomic clocks.
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What does the SI unit "newton" measure?
Detailed Solution for Test: Unit & Measurement - Question 8
The SI unit "newton" (N) is used to measure force. It quantifies the amount of force applied to an object. One newton is defined as the force that would produce an acceleration of one meter per second squared in a one-kilogram mass.
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Which unit measures the distance traveled by light in one year?
Detailed Solution for Test: Unit & Measurement - Question 9
A light year is the unit that measures the distance traveled by light in one year. It is a vast unit used in astronomy to describe the immense distances between celestial objects.
Test: Unit & Measurement - Question 10
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What is the SI unit for electrical resistance, impedance, and reactance?
Detailed Solution for Test: Unit & Measurement - Question 10
The SI unit for electrical resistance, impedance, and reactance is the ohm (?). It measures the opposition to the flow of electric current in a circuit. The higher the resistance, the lower the current flow for a given voltage.
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Important Questions for Unit & Measurement

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