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ampere-hours amperes angle armature artificial line base battery C₁ C₂ cable cells cipher circular mils closed coil column common denominator conductor connected copper current flowing current in branch decimal places deflection diameter difference of potential distance divided dividend dynamo electromotive force equals figure formula 411 gallons galvanometer Hence horsepower hundredths improper fraction inches insulation joint resistance joules length line circuit line wires lines of force magnet magnetic circuit miles minuend mixed number multiplicand multiplier neutral relay obtain Ohm's law ohms operation parenthesis polar relay pole changer proportion quotient r₁ r₂ reduce remainder repeating sounder reserve resistance of branch rheostat root sal ammoniac sectional area side square Substituting subtract subtrahend T.G. Vol telegraph ten-thousands tenths thousands thousandths transmitter trial divisor triangle units volts weight whole number write