Question

How many 176 ohm resistors (in parallel) are required to carry 5A on a 220V line? Distinguish
between the terms electrical resistance and resistivity of a conductor.

Answer 1

For x number of resistors of resistance 176 Ω,Here Supply voltage, V = 220 VCurrent, I = 5 AEquivalent resistance of the combination = R, given as
1/R=x *(1/176)
R=176/x
from ohm's law,
V/I=176/x
x=176*I/v
  =176*5/220
  =4