A horizontal straight wire of length L extending from east to west is falling with speed v at right angles to the horizontal component of Earth's magnetic field B.
a)write the expression for the instantaneous value of the e.m.f induced in the wire.
b)what is the direction of the e.m.f?
c)which end of the wire is at higher potential?...
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Answer:
- The required answer is e= B l v
- direction of induced emf is west to east by using flemings right hand rule
- the right hand side is at a higher potential
Explanation:
e = Blv where B is the vertical component of the earth's magnetic field
l is the length and v is the velocity with which the wire is falling
Apply Fleming's right hand rule to find direction of induced emf. the middle finger indicates that the current increases from right to left
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