A 0.74-m aluminum bar is held with its length parallel to the east-west direction and dropped...

A 0.74-m aluminum bar is held with its length parallel to the east-west direction and dropped from a bridge. Just before the bar hits the river below, its speed is 25 m/s, and the emf induced across its length is 7.9 x 10^-4 V. Assuming the horizontal component of the Earth's magnetic field at the location of the bar points directly north, (a) determine the magnitude of the horizontal component of the Earth's magnetic field, and (b) state whether the east end or the west end of the bar is positive.

Expert Solution

(a) Horizntal component of Earth magnetic field (Bh)= 4.3*10^-5 Wb/m^2

(b) The terminal of bar toward west side(x) will +ve ly charged

The terminal of bar toward East side (y) will -ve ly charged

genius_generous answered 5 months ago

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