A transformer uses iron to make sure that all the magnetic flux passing through the primary ("sending") coil also goes through the secondary ("receiving") coil. Use Faradays Law to show that the ratio of the voltages on the primary and the secondary assuming the resistance of the coils is negligible (in other words, the only voltage across a coil is the induced voltage given by Faraday), is simply the ratio of the number of turns 4. of wire in the primary and secondary. (Hint-it is probably easiest to work backwards: start with the notion of the flux to calculate the voltage on each coil.) If a 12 V transformer for your portable CD player has 100 turns of wire on the 120 V coil, how many turns are on the secondary (12 V side)?
A transformer uses iron to make sure that all the magnetic flux passing through the primary ("sending") coil also goes through the secondary ("receiving") coil. Use Faradays Law to show that the ratio of the voltages on the primary and the secondary assuming the resistance of the coils is negligible (in other words, the only voltage across a coil is the induced voltage given by Faraday), is simply the ratio of the number of turns 4. of wire in the primary and secondary. (Hint-it is probably easiest to work backwards: start with the notion of the flux to calculate the voltage on each coil.) If a 12 V transformer for your portable CD player has 100 turns of wire on the 120 V coil, how many turns are on the secondary (12 V side)?
Chapter15: Alternating-current Circuits
Section: Chapter Questions
Problem 48P: A transformer is used to supply a 12-V model train with power from a 110-V wall plug. The train...
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Transcribed Image Text:A transformer uses iron to make sure that all the magnetic flux passing through
the primary ("sending") coil also goes through the secondary ("receiving") coil. Use
Faradays Law to show that the ratio of the voltages on the primary and the secondary
assuming the resistance of the coils is negligible (in other words, the only voltage across
a coil is the induced voltage given by Faraday), is simply the ratio of the number of turns
4.
Transcribed Image Text:of wire in the primary and secondary. (Hint-it is probably easiest to work backwards:
start with the notion of the flux to calculate the voltage on each coil.) If a 12 V
transformer for your portable CD player has 100 turns of wire on the 120 V coil, how
many turns are on the secondary (12 V side)?
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