At what angular speed should the coil be rotated

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Reference no: EM1350564

Q. A circular coil has 275 turns and a radius of 0.045 m. The coil is used as an ac generator by rotating it in a 0.500 T magnetic field, as shown in the figure. At what angular speed should the coil be rotated so that the maximum emf is 175 V?

Q. The wavelength of Hb in the spectrum of the star Megrez in the big dipper (part of the constellation Ursa Major, the Great Bear) is 486.112 nm. Laboratory measurement demonstrate that the normal wavelength of this spectral line is 486.133 nm. Is the star coming toward us or moving away from us? At what speed?

Reference no: EM1350564

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