Chapter 21, Problem 34P

* EST Generator for space station Astronauts on a space station decide to use Earth’s magnetic field to generate electric current Earth’s $\stackrel{\to }{B}$ field in this region has the magnitude of $\text{3}\text{.0 }\times {\text{ 10}}^{\text{-7}}\text{ T}$. They have a coil that rotates $\text{90°}$ in 1.2 s. The area inside the coil measures ${\text{5000 m}}^{\text{2}}$. Estimate the number of loops needed in the coil so that during that $90°$ turn it produces an average induced emf of about 120 V. Indicate any assumptions you made Is this a feasible way to produce electric energy?