An emf is induced by rotating a 1060 turn, 20.0 cm diameter coil in the Earth's 4.85 x 10-5 T magnetic field. What average emf (in V) is induced, given the plane of the coil is originally perpendicular to the Earth's field and is rotated to be parallel to the field in 10.0 ms?

The figure below shows a 117-turn square coil rotating about a vertical axis at at w = 1,460 rev/min. The length of a side of the coil is 20.0 cm. The horizontal component of the Earth's magnetic field at the coil's location is equal to 2.00 x 10-5 T. 20.0 cm 20.0 cm (a) What is the magnitude of the maximum emf (in mV) induced in the coil by the Earth's magnetic field? mV (b) What is the orientation of the coil with respect to the magnetic field when the maximum emf occurs? The plane of the coil is oriented 45° with respect to the magnetic field. O The plane of the coil is parallel to the magnetic field. The plane of the coil is perpendicular to the magnetic field.

The figure below shows a 108-turn square coil rotating about a vertical axis at ? = 1,390 rev/min.  The length of a side of the coil is 20.0 cm. The horizontal component of the Earth's magnetic field at the coil's location is equal to 2.00 ✕ 10−5 T. What is the magnitude of the maximum emf (in mV) induced in the coil by the Earth's magnetic field? What is the orientation of the coil with respect to the magnetic field when the maximum emf occurs?

A circular loop in the plane of the paper lies in a 0.60 T magnetic field pointing into the paper. The resistance of the coil is 1.55 Ω. If the loop's diameter changes from 20.5 cm to 9.00 cm in 0.40 s, what is the average induced current in milli-amps?