A Square,clamping Ammeter Has Four Sides Each with a Length

question 45

Multiple Choice

A square,clamping ammeter has four sides each with a length of 3.0 cm.The four sides of the ammeter are capable of measuring the magnetic field at the position of the sides.When the ammeter is clamped around a cylindrical wire carrying a 5.0 A DC current as shown in the figure,what is the average magnetic field measured in the sides of the clamp?

• A)0.13 G
• B)0.25 G
• C)0.52 G
• D)1.0 G
• E)2.0 G

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