An emf is induced in response to a change in magnetic field inside a loop of...
An emf is induced in response to a change in magnetic field inside a loop of wire. Which of the following changes would increase the magnitude of the induced emf?
| A. | reducing the diameter of the loop |
| B. | reducing the resistance of the wire of which the loop is made |
| C. | turning the plane of the loop to be parallel to the magnetic field |
| D. | changing the magnetic field more rapidly |
Homework Answers
emf = dflux/dt
flux = B A
so we want to increase the flux
so making dB/dt bigger would make the emf bigger so D
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The figure displays a rectangular loop of wire with sides x and
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a wire loop of
diameter 15 cm is inside a spatially uniform magnetic field of
magnitude .5 T. with the field lines perpendicular to the face of
the loop. what is the magnitude if the emf induced in the loop of
the magnetic field drops uniformly to 0 T in 1 second
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can rotate about either the vertical or horizontal axis, passing
through the midpoints of the opposite sides, as shown.
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