Question: A fixed 13.8-cm-diameter wire coil is perpendicular to a magnetic field 0.77 T pointing up. In 0.12 s, the field is changed to 0.23 T

A fixed 13.8-cm-diameter wire coil is perpendicular to a magnetic field 0.77 T pointing up. In 0.12 s, the field is changed to 0.23 T pointing down. What is the average induced emf in the coil?

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