I was a bit confused on how to go about this problem 8. [1pt] A generator is con

Question

I was a bit confused on how to go about this problem

8. [1pt] A generator is constructed by rotating a coil of N tuns 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 Decide which statements are true and which are false. If the first is T and the rest F, enter TFFFFF. A) The maximum induced EMF doubles if the resistance R is doubled. B) The maximum induced EMF occurs when the coil is rotated about an axis parallel to the magnetic field lines. C) The maximum induced EMF doubles if the magnetic field B is doubled. D) The maximum induced EMF occurs when the coil is rotated about an axis normal to the plane of the coil. E) The maximum induced EMF doubles if the frequency fis doubled F) The maximum induced EMF doubles if the area A is doubled. Answer: Submit All Answers

Explanation / Answer

Simply look at the formula for induced emf:

e = NBA sin(th)

(A) False - induced emf has nothing to do with R

(B) False- will be max when its perpendicular, as can be seen in the eqn, sin90=1(max)

(C) True - emf is proportional to B

(D) True – reverse of (B)

(E) True - emf is proportional to f

(F) True - emf is proportional to A

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