Page 515 - Basic Electrical Engineering

Length CD = BE = AF = 10 cm
Length BC = ED = AB = EF = 8 cm
Length BCDE = 8 + 10 + 8 = 26 cm

Length BAFE = 8 + 10 + 8 = 26 cm
Length BE = 10cm; μ = 1200
r
Total flux, ϕ = ϕ + ϕ 2
1
−3
N = 800, ϕ = 2 × 10 Wb, current, I = ?
2

Let us draw the equivalent electrical circuit of the given magnetic circuit. The
equivalent electric circuit will be as shown in Fig. 5.30.
The voltage drop across CD is I R .
2
2

Figure 5.30

The voltage drop across BE is equal to the voltage drop cross CD.
Therefore,

For the magnetic circuit, from the analogy of the above equivalent electric
circuit, we can write

S is the reluctance of path BCDE
2