A Conducting Loop Has an Area of 0

question 56

Multiple Choice

A conducting loop has an area of 0.065 m² and is positioned such that a uniform magnetic field is perpendicular to the plane of the loop.When the magnitude of the magnetic field decreases to 0.30 T in 0.087 s,the average induced emf in the loop is 1.2 V.What is the initial value of the magnetic field?

• A)0.42 T
• B)0.75 T
• C)0.87 T
• D)1.2 T
• E)1.9 T

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