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A step-down transformer is used for recharging the batteries of portable devices. The turns ratio N/N, for a particular trans will rate, thanks!
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P-VE = 7.634 2408103 © Trans for men formula. Ve = NP Ns Vs V = N V. V2 = 3 x 120 = 7.8261 46 [V2 = 7.63 volts power delivere

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