T LEVEL 2.1 SI UNITS

In which year was the International System of Units (SI) adopted by the 11th General Conference on Weights and Measures (CGPM)?

• 1983

• 1975

• 1960

• 1948

Which unit is defined as the force that gives a mass of one kilogram an acceleration of one metre per second squared?

• Watt

• Pascal

• Newton

• Joule

What is the base unit of luminous intensity in the SI system?

• Lux

• Lumen

• Candela

• Watt

Which constant was used to redefine the kilogram in 2019?

• Avogadro constant

• Boltzmann constant

• Elementary charge

• Planck’s constant

What is the SI base unit for thermodynamic temperature?

• Fahrenheit

• Kelvin

• Celsius

• Rankine

How many base units are there in the International System of Units (SI)?

• 6

• 7

• 8

• 5

Which of the following is NOT a base unit in the SI system?

• Metre

• Mole

• Second

• Gram

What is the SI unit for electric current?

• Coulomb

• Volt

• Ohm

• Ampere

Which unit is used to measure the amount of substance in the SI system?

• Mole

• Litre

• Gram

• Kilogram

What is the SI base unit for the amount of substance?

• Mole

• Gram

• Kilogram

• Litre