A Coil Is Placed in a Magnetic Field and Has

question 69

Multiple Choice

A coil is placed in a magnetic field and has a flux F_B through it.The coil is stressed so that its area reduces to 75% of its original value.If the plane of the coil stays the same and the flux through it remains the same,how must the magnetic field change?

• A)It must increase by 25%.
• B)It must increase by 33%.
• C)It must increase by 125%.
• D)It must decrease by 25%.

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