Electrical installations of electric light, power, traction and industrial electrical machinery (1902)
Kennedy, Rankin, d. 1917 · Edinburgh T.C. & E.C. Jack · leaf 85
e field can be uniform 6q Coil and Plunger Theory and concentrated. A common strength of field induction in theseinstruments is 1500 per square centimetre. In a field of this strength the pull on the coil can becalculated by measuring the length ofwire under the induction in feet.Suppose the… … Fig. 78 ampere, then by formula P = -5 we ^ ^ 98,100 can find the pull, wherein P is the dragin lbs. per foot length of wire, and Cthe current in amperes, B the inductionin C.G.S. lines per sqr. cm., hence 0.0? X 1500 11 —\—-— = 0.01 S lbs.98,100 ^ Moving coil instruments are foundto be reliable,…
Electrical engineering · Electric power
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