Question

Which amount of power is the smallest?

Answer 1

The correct answer is

D- 4 watts

In fact, the different prefixes correspond to the following:

kilowatt: $1 kW = 10^3 W$

megawatt: $1 MW=10^6 W$

gigawatt: $1 GW=10^9 W$

Using the list above, we can convert all the options into Watts:

A) $1 GW=1 \cdot 10^9 W$

B) $2 kW=2 \cdot 10^3 W$

C) $3 MW=3 \cdot 10^6 W$

D) $4 W$

Therefore, the smallest quantity is D) 4 Watts.

Answer 2

D is the correct answer. A watt is the smallest amount of power. The prefix kilo means a thousand, mega means a million and giga means a billion, so, in increasing size: watt - kilowatt - megawatt - gigawatt.