A generator is constructed by rotating a coil of N turns in a magnetic field B 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.

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

A) The maximum induced EMF doubles if the magnetic field B is doubled.
B) The maximum induced EMF occurs when the coil is rotated about an axis normal to the plane of the coil.
C) The maximum induced EMF doubles if the area A is doubled.
D) The maximum induced EMF occurs when the coil is rotated about an axis parallel to the magnetic field lines.
E) The maximum induced EMF doubles if the frequency f is doubled.
F) The maximum induced EMF doubles if the resistance R is doubled

Explanation / Answer

A. True. You're increasing the intensity of the magnetic field, thereby increasing the intensity of the induced EMF.

B. True. The additional motion should translate into increased electric energy

c. True. You're increasing the area subjected to the magnetic field, so the induced EMF will increase.

D.True,

E.False. The frequency is independent of the induced EMF (unless you're approaching zero).

F.False. The induced EMF will be halfed.

.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.