Understanding Joule's Law and Power: How Does It Relate to Heat and Resistance?

[I&Tstudent]

Hello, i want to ask 2 questions:
1-what is the difference between joule's heat and power?
2-We have 2 different resistors.How joule's heat ,which is created in them, will change if they connect to a steady voltage source:(a)in series,(b)in parallel
Thank you

 

[rock.freak667]

What are your thoughts on the subject?

Is Joule's heat just energy or something else? How does energy relate to power?


Also, how is total resistance affected when resistors are in series/parallel?

 

[I&Tstudent]

total resistance in series is Rt=R1+R2+...+Rn and in parallel 1/Rt=1/R1+1/R2+...+1/Rn.
Joule's law sais Q=I^2*R*t where Q the heat generated by a constant current.If (I) and (t) are constant Q is proportionate to R so in series Q will increase more than when the resistors are in parallel.Correct?

 

[rock.freak667]

total resistance in series is Rt=R1+R2+...+Rn and in parallel 1/Rt=1/R1+1/R2+...+1/Rn.
Joule's law sais Q=I^2*R*t where Q the heat generated by a constant current.If (I) and (t) are constant Q is proportionate to R so in series Q will increase more than when the resistors are in parallel.Correct?

Wouldn't the total resistance in parallel be less than in series?

 

[I&Tstudent]

Wouldn't the total resistance in parallel be less than in series?

thats what i said

 

[rock.freak667]

thats what i said

Sorry I read that incorrectly. But you are correct.

and remember that power is the rate of change of energy.