Heat ques.?

Question

A uniform wire connected across a supply produces heat H per second.If the wire is cut into n equal parts and all the parts are connected in parallel across the same supply,the heat produced per second will be-
1. H\n^2
2. n^2H
3. nH
4. H\n

Answer 1

How about doing your homework yourself instead of guessing or trying polls that are ridiculous?

Answer 2

h=v^2/R
if the wire is cut into n equal parts, each one has resistance R/n. if these parts are connected in parallel, the equivalent resistance=R/n^2
so the heat produced will be=v^2/R/n^2=h/n^2. answer 1.

Answer 3

So far you have two different answers that give a direct answer, one of them is correct if only one the n pieces is connected, the other is correct if (as the question states) all of the pieces are connected in parallel, it shouldn't be hard to figure out which is which.

Answer 4

the Heat is H=U^2/R U means voltage , R means resistance,
so the U is the same , and R is 1/n ,
so the H is nH , choose the 3

Answer 5

I don't believe polls are the way, either, but some problems are sometimes intriguing.
H = V^2/R
H2 = nV^2/(R/n) = n^2V^2/R = n^2H
You really shouldn't cheat yourself out of the fun of doing these and the satisfaction of coming up with the answer.