Uniform magnetic field B, exists in the vertical downward direction. A rod whose length is kept horizontal and is moved with velocity v perpendicular to its length. Motional emf developed across the length of the rod is

Uniform magnetic field B, exists in the vertical downward direction. A

1.	Uniform magnetic field B, exists in the vertical downward direction. A rod whose length is kept horizontal and is moved with velocity v perpendicular to its length. Motional emf developed across the length of the rod is
Answer» Solution :MAGNETIC field, velocity and LENGTH should be mutually perpendicular or there must be mutually perpendicular COMPONENTS. When ROD is moved vertical then velocity becomes parallel to magnetic field and hence no EMF is induced across the length. Hence, option (a) is wrong hut (c) is correct. When rod is moved horizontally then B, v and I are mutually perpendicular and hence emf Bul is induced across the length. Hence, option (b) is correct but (d) is wrong Options (b) and (c) are correct.

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Uniform magnetic field B, exists in the vertical downward direction. A rod whose length is kept horizontal and is moved with velocity v perpendicular to its length. Motional emf developed across the length of the rod is

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