I need answer quick!
Category: Reference, Education and News > Education
Asked by: wyzgowski7-ga
List Price: $2.00
24 May 2005 10:48 PDT
Expires: 23 Jun 2005 10:48 PDT
Question ID: 525070
A trnsformer has a primary voltage of 115 V and a secondary voltage of 24 V. If the number of turns in the primary is 345, how many turns are in the secondary?
Re: I need answer quick!
Answered By: welte-ga on 24 May 2005 18:25 PDT
Hi again, Please see this discussion and sample problem regarding primary and secondary transformers: http://hsc.csu.edu.au/physics/core/motors/2697/PHY934net.htm#net9 The relationship between coils and voltages is given by V_p / V_s = n_p / n_s where V_p = primary voltage V_s = secondary voltage n_p = primary turns n_s = secondary turns Solving for n_s, we have n_s = n_p * (V_s / V_p) Substituting, n_s = 345 * (24 V / 115 V) = 72 So, the secondary coil has 72 turns. I hope this was helpful. Please feel free to request clarification. -welte-ga
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