Units and Measurement Chapter 1 Quiz

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How is the result of a measurement of a physical quantity typically expressed?

With a formula

As a number accompanied by a unit (correct)

As a ratio

With a conversion factor

What is the basic reference standard called for the measurement of any physical quantity?

Fundamental unit (correct)

Derived unit

International system

Dimension

What are the units for the fundamental or base quantities known as?

International units

Derived units

Fundamental units (correct)

Basic units

How are the units of all other physical quantities expressed?

As combinations of base units Signup and view all the answers

What do we call the set of both base units and derived units together?

System of units Signup and view all the answers

Which system of units was extensively used by scientists in earlier times?

CGS system Signup and view all the answers

What is the unit for plane angle?

Radian Signup and view all the answers

Which base quantity is measured in kilograms?

Mass Signup and view all the answers

What is the SI unit for time?

Second Signup and view all the answers

Which unit has the symbol 'sr'?

Steradian Signup and view all the answers

What is the SI unit of electric current?

Ampere Signup and view all the answers

Which SI base quantity is defined by the speed of light in vacuum?

Length Signup and view all the answers

Which of the following systems uses foot, pound, and second as base units?

FPS system Signup and view all the answers

Which international system has seven base units as defined in Table 1.1?

SI system Signup and view all the answers

What is the definition of plane angle (dθ) in SI units?

Ratio of length of arc to radius Signup and view all the answers

Why are conversions within the SI system considered simple and convenient?

Because it uses a decimal system Signup and view all the answers

What organization developed the standard scheme of symbols, units, and abbreviations for the SI system in 1971?

Bureau International des Poids et Mesures (BIPM) Signup and view all the answers

Which system is currently internationally accepted for measurement?