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CBSE Class 12-science Answered

Find the change in magnetic flux in a coil of 200 turns and cross-sectional area 0.4 m², when a magnetic field perpendicular to the plane of the coil changes from 0.1 Wb/m² to 0.6 Wb/m².
Asked by Topperlearning User | 07 Jul, 2015, 09:43: AM
answered-by-expert Expert Answer

begin mathsize 12px style straight ϕ space equals space NA space cosθ space open parentheses straight B subscript 2 minus straight B subscript 1 close parentheses end style

Since, θ = 0 ( because the magnetic field is perpendicular to the plane of the coil)

Therefore,

begin mathsize 12px style straight ϕ equals NA open parentheses straight B subscript 2 minus straight B subscript 1 close parentheses
straight ϕ equals 200 space cross times space 0.4 space open parentheses 0.6 space minus space 0.1 close parentheses
straight ϕ equals 40 space Wb end style

 

Answered by | 07 Jul, 2015, 11:43: AM
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