Question

8.Astudent said that the heat energy produced in a current carrying conductor isH=I²Rt another student

said it is given by H=V²t/R joule .Are their statements contradictory justify your answer. ​

Answer 1

Answer:

When an electric current passes through a conductor for some time, the conductor gets heated up. Thus heating of a conductor due to the flow of electric current through it is known as Joule's law of heating.

Heat generated H=i

2

Rt

where i is the amount of current flowing though the conductor, R is the resistance of conductor and t is the time for which the current has flown.

Answered By

Answer 2

When an electric current passes through a conductor for some time, the conductor gets heated up. Thus heating of a conductor due to the flow of electric current through it is known as Joule's law of heating.

Heat generated   H=i  

2

Rt

where i is the amount of current flowing though the conductor, R is the resistance of conductor and t is the time for which the current has flown.

Heat produced H=i  

2

RT

logH=2logi+logR+logT

H

ΔH

​  

=  

i

2Δi

​  

+  

R

ΔR

​  

+  

R

ΔT

​  

 

⇒  Error in H=2×3+4+6=16%.