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Obr. 42. Vinutí cívek o malé kapacitě.Obr. 43. Variometr.Obr. 44. Rozměry voštinové cívky.Indukčnost válcové cívky (Nagaokův vzorec).L = D 3 n 2 k 1L = I 3 n 2 k 2kde značí L indukčnost v uH, D průměr cívky v cm, 1 délku cívkyv cm, k 1a k 2konstanty závisle na poměru I :D (viz tabulku), n početzávitů na centimetr délky cívky (viz následující tabulku):PoměrI : Dk1 X 1000k2 X 1000PoměrI : D;k1 X 1000k2 X 10000,010,0150,020,030,040,050,060,070,080,090,100,150,200,250,300,350,400,450,500,550,600,650,700,750,800,850,900,950,034500,071900,12060,24850,41300.60500,83731,0921,373.1,6412,0063,9086,3139,01611,9915,2718,6322,2525,9329,7533,5237,7241,9446,0550,3954,6958,7563,4834.50021.30415.0809.1836.4514.8403.8763.1852.6812.3052.0061.213789,3577,2443,4356291244,2207,4178,7155,2137,4122,3109,198,1788,9480,7974,041,001,502,002,503,003.504,004,505,005,506,006,507,007,508,008.509,009,5010,0015,002025303540455067,95114161,5209,6257,9307,8355,9405,5454502,7552601,7650,7700,3749,4798,6847,2897,3946,41440193324262919341439084401489567,9533,7720,1913,429,5547,1785,5474,3493,6233,0282,5552,1921,8921,6561,4631,3011,1621,0470,94640,42650,24160,15530,10810,079600,061050,048310,0391436

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