CBSE Class 12-science Answered
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Asked by jain.pradeep | 02 Feb, 2020, 11:46: PM
Expert Answer
Figure shows the cartesian coordinate system along with directions of earth.
X-axis in N-S direction and North is in the -ve x-direction.
Falling metal wire in E-W direction , i.e. along y-axis
Velocity vector 
of falling wire is given by, = - v 
of falling wire is given by, = - v Earths Magnetic field 
= -B
= -BEMF induced in wire = ( v B L )
electrons in the wire are subjected to q( × ) force . Due to the -ve charge of electron, force is in the direction of -ve x-axis
× ) force . Due to the -ve charge of electron, force is in the direction of -ve x-axis Hence electrons accumlate in west giving -ve potential at west end of wire and +ve potential at east end .
hence direction of emf is east to west
Answered by Thiyagarajan K | 03 Feb, 2020, 08:14: AM
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