A 11.8m long steel beam is accidentally dropped by a construction crane from a height of 8.62m. The horizontal component of the Earth's magnetic field over the region is 16.7μT. What is the induced emf in the beam just before impact with the Earth, assuming its long dimension remains in a horizontal plane, oriented perpendicularly to the horizontal component of the Earth's magnetic field?(adsbygoogle = window.adsbygoogle || []).push({});

E=[(xf*L-xi*L)/(tf-ti)]B

and that reads Induced EMF equals x final times length minus x initial times length divided by time final minus time initial quantity multiplied by b.

so i plugged in...

6.62(11.8)-0(11.8)/1.066

i get 95.4183 then i take that and multiply it by B which is 1.67E-5 and i get...

.001593V

and its wrong. im not sure if im using the right formula. i looked at the other formulas i was given but they dont seem to use the values im given.

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# Homework Help: Induced EMF and long steel beam

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