Method: Joules.resistance_in_parallel

Defined in:
lib/joules/electricity.rb

.resistance_in_parallel(resistances) ⇒ Float

Calculates the total resistance of resistors in parallel.

Examples:

Joules.resistance_in_parallel([0.5, 0.25, 0.125]) #=> 0.07142857142857142

Parameters:

  • resistances (Array<Int, Float>) —

    each resistance in resistances != 0; each resistance in resistances is in ohms

Returns:

  • (Float) —

    return value is in ohms



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# File 'lib/joules/electricity.rb', line 115

def resistance_in_parallel(resistances)
  total_resistance = 0
  if resistances.empty?
    return total_resistance.to_f
  else
    resistances.each do |resistance|
      total_resistance += (1.0 / resistance)
    end
    return 1 / total_resistance
  end
end