## Mathematics for electricians |

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12 ohms 3-phase 60 cycles 90 per cent alternating current ammeter amperes apparent power armature armature resistance battery busbar Calculate capacitance cells cent lagging cent power factor circular mils coil whose resistance complex expression condenser connected in parallel connected in series copper loss copper wire Cot NTan NSin counter e.m.f. current flowing decimal point denominator diameter divided equal equation Example field resistance figure Find the current Find the e.m.f. Find the resistance Find the total Find the value formula fraction group of lamps horsepower hypotenuse instantaneous value internal resistance kilowatts line current line wires load logarithm mantissa motor draws multiplying NCOS N Cot noninductive resistance NTan N Cot Ohm's law ohms are connected permission from Table Problems quantity Repeat Prob right triangle shunt-field side Solution square Substitute subtract term Three resistances total current total resistance Trigonometry vector voltage drop voltmeter volts watt-hour watts