Question

how many 176 ohm resistors in parallel are connected to carry 5A on a 220 week line

Answer 1

Let equivalent resistance be R
We know V=IR
R=V/I
=220/5=44
Let n no.of 176 ohm resistance be n.
Therefore
1/176+1/176+....n times=1/44
n/176=1/44
So 176/n=44
n=4
Hope this helps :)

Answer 2

Let equivalent resistance be r.

By Ohm's Law

we have: v=ir

where v =voltage,i=current

Now r=v/i

ATP,

r=220/5=44ohms

Let x resistances be connected in parallel

Hence 1/r+1/r+1/r....x times=1/44

x/r=1/44

x/176=1/44

x=176/44

which is 4.

So 4 resistors are in parallel.