from 12.5 Wb to the (15%) The magnetic fix that passes through one turn of a10-t
ID: 1580543 • Letter: F
Question
from 12.5 Wb to the (15%) The magnetic fix that passes through one turn of a10-turn coil or wire changes 2.5 Wb in a time of 0.025 s. The average induced current in the coil is 20 A. What is the resistance of wire? S. (10%) The drowing shows a n time, a new current is induced through the resistor R. Draw a line with arrow parañel to the resistor to show the diction of the induced current through the resistor R-left-to-right or right-to-left. (10%) You need to design a 60.0-Hz ac generator that hasa maximum emf of 2500 V. The generator is to contain a 210-turn coil that has an area per turn of 0.74 m2. what should be the magnitude of the magnetic field in which the coil rotates? 7,Explanation / Answer
Use Faraday's Law of Induction:
Volts induced = - N•d/dt
where N is the number of turns, and is the magnitude of the magnetic field.
V = IR, or R = V / I
Substitute the values in equation.
V = -10•[2.5Wb - 12.5Wb] / 0.025s
V = 4000 V the sign just indicates direction
Calculate the resistance of wire.
R = 4000V /20A
R = 200
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