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A transformer is to be used to provide power for a computerdiskdrive that needs 6.0V (rms) instead of the 120 V (rms) fromthewall outlet. The number of turns in the primary is 400. Findthenumber of turns in the secondary?

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Elin Hessel
Elin HesselLv2
24 Sep 2019
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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

31.35. A Step-Down Transformer. A transformer connected to a 120-V (rms) ac line is to supply 12.0 V (rms) to a portable electronic device. The load resistance in the secondary is 5.00 12. (a) What should the ratio of primary to secondary turns of the transformer be? (b) What rms current must the secondary supply? (c) What average power is delivered to the load? (d) What resis- tance connected directly across the 120-V line would draw the same power as the transformer? Show that this is equal to 5.00 12 times the square of the ratio of primary to secondary turns.



The primary coil of a transformer has 200 turns, and the secondary coil has 800 turns. The transformer is connected to a 120-volt (RMS) ac source. What is the (RMS) current I1in the primary coil if the secondary coil is terminated by a 20-ohm resistor?

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