I need help answering this question A person takes a hoop of 5cm and aligns its

Question

I need help answering this question
A person takes a hoop of 5cm and aligns its area vector withthe Earth's magnetic field. Then the person spins the hoop. Approx how fast does the hoop need to spin in rotations asec, in order to produce and emf or 1 V. The mag field of theearth is 1X10^-5
A person takes a hoop of 5cm and aligns its area vector withthe Earth's magnetic field. Then the person spins the hoop. Approx how fast does the hoop need to spin in rotations asec, in order to produce and emf or 1 V. The mag field of theearth is 1X10^-5

Explanation / Answer

r = 5 cm, V = 1 V, B = 1*10-5 T find V = B*(r2) = V/(r2B) = 1.27*107rad/s = 2.03*106 rotations/s

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