A circular coil and a bar magnet placed nearby are made to move in the same direction. If the coil covers a distance of 2 m in 1 sec and the magnet a distance of 4 m in 2 sec. calculate the induced emf produced in the coil.

Asked by Topperlearning User | 7th Jul, 2015, 08:43: AM

Expert Answer:

speed of the coil is calculated as,

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Speed of magnet is calculated as,

begin mathsize 12px style straight v subscript straight m equals 4 over 2 equals space 2 space straight m divided by straight s end style

Relative velocity of the coil w.r.t magnet         

begin mathsize 12px style straight v subscript straight c space minus space straight v subscript straight m space equals space left parenthesis 2 minus 2 right parenthesis space equals space 0
end style

Therefore, the induced emf in the coil is zero.

 

Answered by  | 7th Jul, 2015, 10:43: AM