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How many \(176\ Ω\) resistors (in parallel) are required to carry \(5\ A\) on a \(220\ V\) line?
 
Number of required resistors \(=\ x\)
 
The equivalent resistance of the parallel combination of resistor \(R\) is given by
 
R=ii
 
From the Ohm's law, i=i×i, the formula for resistance can be found.
 
i=ii
 
On substituting the known values, we get the number of required resistors as .