The Earth’s magnetic field is typically 5x10^–5 T, but fluctuates with time. Suppose the fluctuations in the Earth’s field are sinusoidal with a frequency of 10⁴ Hz and an amplitude of 5% of the magnitude of the Earth’s field. What is the approximate magnitude of the induced emf in a loop of wire of area 1 cm² with the area perpendicular to the field?