what do you mean by thermal effect of electric current? i will mark as branlist answer
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When an electric current flows through a conductor, electrical energy is expended n over coming the frictional resistance between eh electrons and the molecules of the wire.
If potential difference of V volts is applied across a conductor and current of I amperes flows through it for time of t seconds, then energy expended will be equal to VIt watt-secs or joules.
If R is the resistance of the conductor through which a current of I amperes flows and V is the potential difference applied across its end then by Ohm’s law
V- IR
and energy expended, W = VIt = IR X I X t = I2Rt joules
or W also = V X V t = V2 t joules
R R
According to the law of conservation of energy this electrical energy expended must be converted in some other form of energy an I that other form is hear i.e. electrical energy expended is converted into heat energy and conversion of electrical energy into heat energy is called the thermal effect of electric current.
If potential difference of V volts is applied across a conductor and current of I amperes flows through it for time of t seconds, then energy expended will be equal to VIt watt-secs or joules.
If R is the resistance of the conductor through which a current of I amperes flows and V is the potential difference applied across its end then by Ohm’s law
V- IR
and energy expended, W = VIt = IR X I X t = I2Rt joules
or W also = V X V t = V2 t joules
R R
According to the law of conservation of energy this electrical energy expended must be converted in some other form of energy an I that other form is hear i.e. electrical energy expended is converted into heat energy and conversion of electrical energy into heat energy is called the thermal effect of electric current.
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