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dukesolice
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Moved from a technical forum, so homework template missing
Magnetic field values are often determined by using a device known as a search coil. This technique depends on the measurement of the total charge passing through a coil in a time interval during which the magnetic flux linking the windings changes either because of the motion of the coil or because of a change in the value of B. As a specific example, calculate B when a 61-turn coil of resistance 194Ω and cross-sectional area 44.5m2 produces the following results: A total charge of 4.76E-4C passes through the coil when it is rotated in a uniform field from a position where the plane of the coil is perpendicular to the field to a position where the coil's plane is parallel to the field.
I know the formula emf = -change in flux, but I don't know how to get the change in the area and how to use the charge given.
I know the formula emf = -change in flux, but I don't know how to get the change in the area and how to use the charge given.