Item 1 In (Figure 1) , the moving rod has a resistance of 0.25 and moves on rail

Question

Item 1

In (Figure 1) , the moving rod has a resistance of 0.25 and moves on rails 20.0cm apart. The stationary U-shaped conductor has negligible resistance. When a force of 0.350 N is applied to the rod, it moves to the right at a constant speed of 1.40 m/s .

Part A

What is the magnetic field?

Express your answer using two significant figures.

Item 1

In (Figure 1) , the moving rod has a resistance of 0.25 and moves on rails 20.0cm apart. The stationary U-shaped conductor has negligible resistance. When a force of 0.350 N is applied to the rod, it moves to the right at a constant speed of 1.40 m/s .

Part A

What is the magnetic field?

Express your answer using two significant figures.

Explanation / Answer

induced voltage=B*V*L=0.28B

current=(induced voltage)/(resistance)=28B/25

Force due to magnetic field=I*L*B=0.350

28*0.28*B2/25=0.350

B=1.05 T

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