A Coil of Wire Containing N Turns Is in an External

question 65

Multiple Choice

A coil of wire containing N turns is in an external $\vec { B }$ field that is perpendicular to the plane of the coil and it steadily changing in magnitude.Under these circumstances,an emf ε is induced in the coil.If the rate of change of the magnitude of the $\vec { B }$ field and the number of turns in the coil are now doubled (but nothing else changes) ,what will be the induced emf in the coil?

• A)2ε
• B)ε/2
• C)4ε
• D)ε/4
• E)ε

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