SI base units and derived units

Which of the following quantity is base quantity ?

• voltage
• electric current
• electric energy
• electric power

Which of the following pairs of physical quantity and SI unit is correct ?

• Mass - SI unit : Gram
• Time - SI unit : Hour
• Electric current - SI unit : Volt
• Temperature - SI unit : Kelvin

Which of the following shows the prefixs in descending order correctly ?

• mega, giga, kilo, nano
• giga, kilo, mega, nano
• nano, kilo, mega, giga
• giga, mega, kilo, nano

Which of the following is the longest ?

• 2.35 x 10^12 μm
• 2.35 x 10^6 mm
• 2.35 x 10^4 cm
• 2.35 x 10^4 m

What is base quantities ?

• the branch of science concerned with the nature and properties of matter and energy
• the branch of science that deals with the identification of the substances of which matter is composed
• physical quantities that cannot be defined in terms of other physical quantities

What is derived quantities ?

• a tendency to do nothing or to remain unchanged.
• combination of two or more base quantities
• the quantity of motion of a moving body, measured as a product of its mass and velocity.

a measurement from end to end of an object

• length
• mass
• force
• temperature

a measurement of how hot or cold something is 

• force
• temperature
• length
• mass

Metric (SI) Unit for Length

• Milliliters (ml), Liters (L)
• Grams (g), Kilograms (kg), Milligrams (mg)
• Newtons (N)
• Meters (m), Centimeters (cm), Millimeters (mm)

The SI unit for time is the __?__.

• meter (m)
• liter (L)
• gram (g)
• second (s)