An electric motor takes $ 5 \mathrm{~A} $ from a $ 220 \mathrm{~V} $ line. Determine the power of the motor and the energy consumed in $ 2 \mathrm{~h} $.
Here given,
Current $i=5\ A$
Voltage $V=220\ Volt$
Time $t=2\ hour=2\times60\times60=7200\ s$
So, the power of the motor $P=Vi$
$=220\ Volt\times 5\ A$
$=1100\ Watt$
$=1.1\ kW$ [we know that $1\ kW=1000\ Watt$]
So, energy consumed by the motor $E=Pt$
$=1.1\ kW\times 2\ hour$
$=2.2\ kWh$
Therefore, the electric motor consumed $2\ kWh$ energy in $2\ hours$.
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