Challenge!!!

JEE Mains 2015 Tutorials › General Physics questions › Challenge!!!

A piece of straight conducting wire 1m long is held horizontally at a height pointing east to west.Then the wire is let fall freely.Find the difference of potential between the ends of the wire after 1 second.Horizontal component of the earth's magnetic field at a place is 0.25 Gauss.

#Physics #General Physics

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2 Answers

11

Devil ·2009-12-18 07:01:27

Let the wire fall some ht x....
Velocity=\sqrt{2gx}....Total ht=\frac{g}{2}....Thus emf induced will be

E=\int_{0}^{\frac{g}{2}}B\sqrt{2gx}.ldx....

Pls correct me if wrong....

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sourangsu Banerji ·2009-12-20 05:59:29

Yeah you absolutely got it correct!!

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