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WorksheetsPhysical Quantity and Units
Total questions: 10
Worksheet time: 50mins
Which of the following is an SI base unit?
current
gram
Kelvin
volt
Which of the following pairs of units are both SI base units?
ampere, degree celsius
ampere, kelvin
gram, degree celsius
gram, kelvin
A student measures a current as 0.5A.
Which of the following correctly expresses this result?
50 mA
50 MA
500 mA
500 MA
The notation µs is used as an abbreviation for a certain unit of time.
What is the name and value of this unit?
microsecond ,
10–6 s
microsecond ,
10–3 s
milisecond ,
10–6 s
milisecond ,
10–3 s
When a beam of light is incident on a surface, it delivers energy to the surface.
The intensity of the beam is defined as the energy delivered per unit area per unit time.
What is the unit of intensity, expressed in SI base units?
kg m–2 s–1
kg m2 s–3
kg s–2
kg s–3
Which line of the table gives values that are equal to a time of 1 ps (one picosecond) and a distance of 1 Gm (one gigametre)?
10–9 s ,
109 m
10–9 s ,
1012 m
10–12 s ,
109 m
10–12 s ,
1012 m
Decimal sub-multiples and multiples of units are indicated using a prefix to the unit. For example, the prefix milli (m) represents 10–3.
Which of the following gives the sub-multiples or multiples represented by pico (p) and giga (G)?
10–9 ,
109
10–9 ,
1012
10–12 ,
109
10–12 ,
1012
Which product-pair of metric prefixes has the greatest magnitude?
pico × mega
nano × kilo
micro × giga
milli × tera
Which is a pair of SI base units?
ampere,
joule
coulomb,
second
kilogram,
kelvin
metre,
newton
Five energies are listed.
5 kJ
5 mJ
5 MJ
5 nJ
Starting with the smallest first, what is the order of increasing magnitude of these energies?
5 kJ → 5 mJ → 5 MJ → 5 nJ
5 nJ → 5 kJ → 5 MJ → 5 mJ
5 nJ → 5 mJ → 5 kJ → 5 MJ
5 mJ → 5 nJ → 5 kJ → 5 MJ
