A Circular Coil Has 275 Turns and a Radius of 0.045

question 7

Multiple Choice

A circular coil has 275 turns and a radius of 0.045 m.The coil is used as an ac generator by rotating it in a 0.500 T magnetic field,as shown in the figure.At what angular speed should the coil be rotated so that the maximum emf is 175 V?

• A)28 rad/s
• B)50 rad/s
• C)130 rad/s
• D)200 rad/s
• E)490 rad/s

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