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The heating element of a room heater is rated at 750W when itis operated from a 120V power supply?

a) What is the resistance of the heating element?
b) If the heating element is made of nichrome wire that is1.0mm in diamenter, how long is the wire? The resistivity ofnichrome is 1x10-6 ohm-m.
c) If electricity costs ten cents per KW-hr, how much does itcosts to operate this heater for 2 hours and 45 minutes?

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  • Category:- Physics
  • Reference No.:- M91093884

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