Tag: power
Questions Related to power
A two kilowatt motor pumps out water from a well 10 meter deep. The quantity of water pumped out per hour is ( g = 10 $m/s^2$)
If the heart pushes 1 cc of blood in one second under pressure 20000 $N/m^2$ the power of heart is:
The pump of a water pumping system uses $2.0\ kW$ of electrical power when raising water. The
pumping system lifts $16kg$ of water per second through a vertical height of $7.0\ m$.
What is the efficiency of the pumping system?
Choose the correct option.
In our household applications, commercial unit of electricity is used. One unit is equal to:
$250 kg$ of water per minute is to be drawn from a well $150 m$ deep. An electric pump of _______ can be used. $(g = 10 m/s^2) $
Which of the following can be used to express energy? Symbols have their usual meanings for the units of physical quantities.
(i) Wh (ii) VC (iii) VAs$^2$ (iv) A$^2\Omega$s
Electric energy supplied to homes is measured by
1 kilowatt-hour is the amount of .... by 1000 watt electric appliance when it operates for one hour.
Convert 1 kWh to SI unit of energy.