Map sapling earning Investigators are researching the appearance of a strange mo

Question

Map sapling earning Investigators are researching the appearance of a strange movement of objects in what the local community considers a haunted house. The owners of the house attribute the cause to poltergeists, others blame overly strong magnetic fields could be the cause. As a scientific investigator of paranormal claims, you decide to investigate. You will start by focusing on magnetic fields Using a coil made of 117 turns of single-strand copper wire, you use a motor to rotate the coil at a constant angular speed of 70.0 revolutions per second at various orientations and locations throughout the room. In one particularly signficant orientation, you notice a maximum induced voltage of 3.15 V appearing in the coil lf the radius of the coils is 1.00 cm, how strong was the magnetic field that produced this EMF? Number 000194 T Can you rule out the possibility that unusually strong magnetic fields are causing the strange behavior? No, because the magnetic field producing the EMF is much stronger than the magnetic field of the Earth Yes, because the magnetic field producing the EMF is about the same strength as that of the Earth Incorrect Paranormal skeptics use other equipment to investigate claims of ghosts and poltergeists, such as video and audio recorders

Explanation / Answer

EMF=NBAwsin(wt)

For maximum EMF, sin(wt) = 1 ============> EMF = NBAw ======> B =EMF/NAw

B = 3.15/(117*pi*0.01^2*70) = 1.224 T

Hop it is correct.

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