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  An electric drill operates at potential difference 120 Volts and a draws current of 6.0 Amp.If takes 45 seconds  for the drill to make hole in a piece of wood, how much energy is used by the drill.?      An electric drill operates at potential difference 120 Volts and a draws current of 6.0 Amp.If takes 45 seconds  for the drill to make hole in a piece of wood, how much energy is used by the drill.?  Kindly explain time will be in seconds or we have to convert to minuts-?        
Asked by bcnandi | 11 May, 2019, 05:42: PM
answered-by-expert Expert Answer
Power = voltage × current = 120×6 = 720 W
Energy = Power×time = 720×45 = 32400 J = 32.4 kJ
 
Power is rate of work (or energy consumed ) i.e.  energy per sec.  
Hence time should be in seconds
Answered by Thiyagarajan K | 11 May, 2019, 08:02: PM

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