Question

The ampere, metre and second are SI base units. State two other SI base units.

Answer 1

Hint: Without units all calculations are meaningless. There are some international units set by the International System of Units or SI units. There are seven base quantities in physics, these are: mass, length, time, luminous intensity, temperature, amount of substance.

Complete step by step answer:
In physics, physical quantities to be measured are very large, it is not practical to use different units for all of them.
There is nothing more basic than mass, length and time. For example velocity can be obtained as distance divided by time.
Therefore mass, length and time are base units. In addition to it other base quantities namely temperature, current, luminous intensity and amount of substance. Therefore in all there are seven base quantities.
The units selected for measurement of base quantities are known as base units or absolute units or fundamentals units.
And units which are obtained with these base units are called derived units. Example velocity, acceleration.
SI units or International System of units assigned to these base units are-

Quantity	Unit
Mass	Kilogram (kg)
Length	metre (m)
Time	second (s)
Current	Ampere (A)
Temperature	Kelvin (K)
Luminous Intensity	Candela (cd)
Amount of substance	Mole (mol)

We are asked for two more SI units in our question other than ampere, metre and second are Kilogram (kg) and Kelvin (K).

Note: It is advised to students, in solving numerical problems, to first change CGS (centimetre, gram, second) which is a smaller unit to SI units, so the answer obtained is correct. These seven base units are repeatedly used to determine the dimensional formula of any physical quantity.