Q1. Figure 1 shows a coils of 100 turns is uniformly wound around a wooden ring with a mean circumference of 5cm and area of cross-section of 250mm2. If the current flowing into the coil is 2A. a) Determine the magnetic flux ; b) If the wooden ring is replaced with the cast steel ring, evaluate the effect of the flux produced. ANS: 1.26x10°Wb; 375x10°Wb L=2mm Cast steel Yoke turn N=500 I meter Sheet steel Plunger

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Q1. Figure 1 shows a coils of 100 turns is uniformly wound around a wooden ring
with a mean circumference of 5cm and area of cross-section of 250mm?. If the
current flowing into the coil is 2A. a) Determine the magnetic flux ; b) If the wooden
ring is replaced with the cast steel ring, evaluate the effect of the flux produced.
ANS: 1.26x10°Wb; 375x10°Wb
I =2mm
Cast steel Yoke
turn
N=500
I meter
Figure 1
la=2mm
Figure 2
Sheet steel Plunger
Transcribed Image Text:Q1. Figure 1 shows a coils of 100 turns is uniformly wound around a wooden ring with a mean circumference of 5cm and area of cross-section of 250mm?. If the current flowing into the coil is 2A. a) Determine the magnetic flux ; b) If the wooden ring is replaced with the cast steel ring, evaluate the effect of the flux produced. ANS: 1.26x10°Wb; 375x10°Wb I =2mm Cast steel Yoke turn N=500 I meter Figure 1 la=2mm Figure 2 Sheet steel Plunger
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