Problem 29.15 Review Part A Point A in (Figure 1) is 3 5 mm from the...

Question

Question

Answer 1

Answer #1

20 and 30 ohms are in series

R₁=20+30 =50 ohms

100 and R1=50 ohms are in parallel .Therefore equivalent resistance is

R =(1/100 + 1/50)^-1 = 33.33 ohms

Total Current

I=V/R =60/33,33 =1.8 A

Current through 100 ohms

I₁₀₀=60/100 =0.6 A

Current through point A

I_A =1.8-0.6 =1.2 A

Magnetic field at point A

B=u_oI_A/2pir =(4pi*10^-7)(1.2)/2pi*(3.5*10^-3)

B=6.857*10^-5 T or 68.57 uT

Answer 2

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