A generator is constructed by rotating a coil of N turns in a magnetic field B a
ID: 2035935 • Letter: A
Question
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. 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 f is doubled.
F) The maximum induced EMF doubles if the area A is doubled.
Explanation / Answer
A) False .......... induced emf does not depend on resistance
B) false......
C) True........ emf proportional to B
D) false
e) true....... emf proportional to f
f) true............ emf proportional to A
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