Understanding Base Quantities and Derived Quantities

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

A radio station transmits a radio wave of frequency 98.8 MHz. What is the frequency in Hz ?

• 9.88 x 10^4
• 9.88 x 10^5
• 9.88 x 10^6
• 9.88 x 10^7

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

The speed of the car in diagram is 72 km/h
What is the speed in ms-1 ?

• 18
• 20
• 36
• 40

Which of the following values is equal to 710 nF ?

• 7.1x10^-11 F
• 7.1x10^91 F
• 7.1x10^-8 F
• 7.1x10^-7 F

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.

Tags

NGSS.MS-PS3-1

Name the physical quantity measured by the voltmeter

• Voltage
• voltmeter
• V