A 100-turn coil with a radius of 10.0 cm is mounted so the coil's axis can be oriented in any horizontal direction. Initially the axis is oriented so the magnetic flux from Earth's field is maximized. If the coil's axis is rotated through 90.0° in 0.080 s, an emf of 0.687 mV is induced in the coil.
(a) What is the magnitude of the horizontal component of Earth's magnetic field at this location?
(b) If the coil is moved to another place on Earth and the measurement is repeated, will the result be the same?