The Magnetic Field Inside a Circular Loop of Wire of Radius

question 44

Multiple Choice

The magnetic field inside a circular loop of wire of radius 30 cm increases at a constant rate from 2.0 × 10^-3 T to 3.5 × 10^-3 T in 0.47 s.If the resistance of the loop is 0.31 Ω,what is the current in the loop?

• A)7.4 × 10^-4 A
• B)5.8 × 10^-4 A
• C)2.9 × 10^-3 A
• D)5.8 × 10^-3 A

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