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In the above circuit, the mesh current equation for the mesh d (where the mesh current id is defined) is −250ib + 650id − 400ie + 50iΔ = 0 −250ib + 650id − 400ie − 50iΔ = 0 −250ib + 250id − 400ie − 50iΔ = 0 −250ic + 250id − 400ie − 50iΔ = 0

In the above circuit, the mesh current equation for the mesh d (where the mesh current id is defined) is −250ib + 650id − 400ie + 50iΔ = 0 −250ib + 650id − 400ie − 50iΔ = 0 −250ib + 250id − 400ie − 50iΔ = 0 −250ic + 250id − 400ie − 50iΔ = 0

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In the above circuit, the mesh current equation for the mesh d (where the mesh current i d is defined) is − 250 i b + 650 i d − 400 i e + 50 i Δ = 0 − 250 i b + 650 i d − 400 i e − 50 i Δ = 0 − 250 i b + 250 i d − 400 i e − 50 i Δ = 0 − 250 i c + 250 i d − 400 i e − 50 i Δ = 0

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