A 40-Turn Circular Coil (Radius = 4

question 20

Multiple Choice

A 40-turn circular coil (radius = 4.0 cm, total resistance = 0.20 Ω) is placed in a uniform magnetic field directed perpendicular to the plane of the coil. The magnitude of the magnetic field varies with time as given by B = 50 sin(10 πt) mT where t is measured in s. What is the magnitude of the induced current in the coil at 0.10 s?

• A) 50 mA
• B) 1.6 A
• C) 0.32 A
• D) zero
• E) 0.80 A

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