(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A generator is constructed by rotating a coil of N turns in a magnetic field B at a frequency f. The internal resistance of the coil is R and the cross sectional area of the coil is A.

Which of the following statements are true? (Give ALL correct answers, i.e., B, AC, BCD...)

A) The maximum induced EMF occurs when the coil is rotated about an axis parallel to the magnetic field lines.

B) The average induced EMF doubles if the area A is doubled.

C) The average induced EMF doubles if the frequency f is doubled.

D) The average induced EMF doubles if the resistance R is doubled.

E) The maximum induced EMF occurs when the coil is rotated about the axis of the coil.

F) The average induced EMF doubles if the magnetic field B is doubled.

2. Relevant equations

[tex]|\epsilon| = I R[/tex]

[tex]|\epsilon| = NA\frac{\Delta B}{\Delta t} [/tex]

3. The attempt at a solution

Well, im fairly sure A is false, B is true, E is true and F is true. I think D is false, and i cant find any expressions in my book relating frequency to emf. I don't really know the relationship between frequency and induced emf.

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# Homework Help: Induced Emf, Contributing factors

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