A dense bundle of insulated cables is shown in Figure Q2a. Each cable carries a DC current as shown where I is the current. The direction of the currents are indicated with currents flowing into the page taken as positive. i) For I = 2 A obtain the applied field strength at a distance of 1.5 cm from the bundle. ii) The bundle is encased in a medium of unknown permeability. The resultant field at a radius of 1 cm is measured to be 130 uT when I = 1.5 A. Determine the material's relative permeability. 0.2 I +) 1.5 I +) 0.75 I +) 0.7 I 0.4 I 1.2 I Figure Q2a

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2. a)
A dense bundle of insulated cables is shown in Figure Q2a. Each cable carries a DC
current as shown where I is the current. The direction of the currents are indicated with
currents flowing into the page taken as positive.
i)
For I = 2 A obtain the applied field strength at a distance of 1.5 cm from the
bundle.
ii)
The bundle is encased in a medium of unknown permeability. The resultant field
at a radius of 1 cm is measured to be 130 uT when I = 1.5 A. Determine the
material's relative permeability.
0.2 I
1.5 I
0.75 I
+)
0.7 I
0.4 I
1.2 I
Figure Q2a
Transcribed Image Text:2. a) A dense bundle of insulated cables is shown in Figure Q2a. Each cable carries a DC current as shown where I is the current. The direction of the currents are indicated with currents flowing into the page taken as positive. i) For I = 2 A obtain the applied field strength at a distance of 1.5 cm from the bundle. ii) The bundle is encased in a medium of unknown permeability. The resultant field at a radius of 1 cm is measured to be 130 uT when I = 1.5 A. Determine the material's relative permeability. 0.2 I 1.5 I 0.75 I +) 0.7 I 0.4 I 1.2 I Figure Q2a
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