Measurement — Practice

Question 1

Electric current belongs to (a) derived quantities (b) base quantities.

Accepted Answer

(b) base quantities.

Question 2

The SI unit of temperature is ____.

Accepted Answer

kelvin (K).

Question 3

The closeness of two or more measured values is called ____.

Accepted Answer

precision.

Question 4

One coulomb of charge flowing per second is called one ____.

Accepted Answer

ampere.

Question 5

Name the seven base quantities.

Accepted Answer

Length, mass, time, temperature, electric current, luminous intensity and amount of substance.

Question 6

Differentiate accuracy and precision.

Accepted Answer

Accuracy is how close a measurement is to the true value; precision is how close repeated measurements are to one another.

Question 7

How is the volume of an irregular solid measured?

Accepted Answer

By the displacement of water — the rise in water level equals the solid's volume.

Practice — Measurement