Tag: physics

joule and calorie are both units of energy .
$1\  joule = 0.24 \ calories$

We know that $ power = work/ time$.

Energy consumed in a month
$=250 : units = 250 : kWh$
$= 250 \times 3.6 \times 10^6 = 9 \times 10^8:J $

The kilowatt-hour ($kWh$) is a unit of energy equivalent to one kilowatt ($1\  kW$) of power expended for one hour ($1\  h$) of time.

False
because,The kilowatt-hour (kWh) is a unit of energy equivalent to one kilowatt (1 kW) of power expended for one hour (1 h) of time.

The commercial unit of measurement energy is Kilowatt hour.

$1000\ W= 1\ kW$
$1000 \ kW= 1\ MW$

This is unit of energy.If the energy is being transmitted or used at a constant rate over a period of time, the total energy in kilowatt hours is the power in kilowatts multiplied by the time in hours.

Joule, kilowatt Hour and Ergs are different units of the physical quantity Energy.