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)?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A coil of 2000 turns, each of area 0.02m² is kept in a uniform field of magnetic induction 4 x 10T, If coil rotates with speed of 1200 r.p.m. about an axis in the planė of the coil and perpendicular to the magnetic induction. Calculate the peak value of the e.m.f. Also write the equation of an instantenous e.m.f. generated in the coil.
Which of the following statements are true? Choose all that apply. A changing magnetic field will always induce a voltage. As current through an inductor decreases, the inductance remains constant. For an LR circuit, as R increases, & decreases. Transformers can simultaneously decrease voltage & decrease current. Generators transform electrical energy (electricity) into kinetic energy. The mks units for inductance are Wb.
Do it
According to Faraday's Law, the induced EMF produced is proportional to the rate of charge of the magnetic flux with respect to time. Select one: True O False
A generator has a 100-turns coil that rotates in a 0.30-T magnetic field at a frequency of 80 Hz, causing a peak voltage of 38V. (a) calculate the area of each loop of the coil. (b) Write an expression for the voltage as a function of time. (c) Calculate the voltage at 0.0140s.
Does an MHD generator employ Faraday’s law of induction?
Which option most accurately defines Faraday's law? Any change in the electric field over a conductor will produce an magnetic field inside a conductor. The voltage generated in a coil is inversely proportional to the cross-sectional area of the coils loops. Any change in the magnetic field over a conductor will produce an electromotive force and electric current in the conductor. The voltage generated in a coil is inversely proportional to the number of electrons in the loop.
A 120V e.m.f is across a transformer's 200-turn primary coil. How many turns should a secondary coil have in order to produce a 30V e.m.f?
At what frequency should a 153-turn, flat coil of cross sectional area of 222 cm² be rotated in a uniform 29-mT magnetic field to have a maximum value of the induced emf equal to 6 V? Write your answer in hertz.