MAGNETISM ANSWERS - -1-PHYSICS 212CHAPTER 19

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: -1-PHYSICS 212CHAPTER 19 MAGNETISMWORKBOOKANSWERS-2-PHYSICS 212 OUTLINEMAGNETISM1MagnetsComplete the following: 1. Magnetic fields affect _moving charges_____ and moving charges produce__magnetic fields_______ .2. The ends of a bar magnet are called __poles________. And are identified as the _north pole___ and the ____south pole__ .3. Like poles _repel______ and unlike poles __attract______ .Compare and contrast soft and hard magnetic materials.Soft materials are easily magnetized but also easily lose their magnetism.Hard materials are harder to magnetize but hold their magnetism longer.What symbol is used to designate a magnetic field? _____________________BaDraw a sketch of a bar magnet. 2 EARTHS MAGNETIC FIELDIf you were sent on a job to Earths magnetic south pole, where would you go geographically?Near the north geographic pole.Define:magnetic dip angle: The angle between the magnetic field and horizontal-3-magnetic declination: The angle between the magnetic field direction to north andtrue north the direction to the geographic north pole3 MAGNETIC FIELDSWhat are the SI units of the magnetic field? TeslaWhat are the cgs units of the magnetic field and the conversion factor between cgs and SI units?Gauss, 1G = 10-4TUnder what condition will th force on a moving charge in a magnetic field be maximum?The force is maximum when the velocity is perpendicular to the field.Under what two different conditions can a charged particle be in a magnetic field and not experience anyforce?When it is stationary or moving parallel to field lines.What is the name of the rule used to determine the direction of the force on a moving charge in amagnetic field?The right hand rule.4 MAGNETIC FORCE ON A CURRENT-CARRYING CONDUCTORWrite the equation for the force on a length of current-carrying wire listing and naming all variablesalong with their SI units.sinFBIL=FForce on wireNBmagnetic fieldTICurrent in wireALLength of wiremangle between I and BdegA current is directed to the east inside an apparatus in which there is an upward magnetic field. In whatdirection is the current displaced? -4-toward the south5 TORQUE ON A CURRENT LOOP AND ELECTRIC MOTORSDoes the torque on a current loop depend on the shape of the loop?No, on area, current and number of turns of wire.How should a current loop be positioned so it has no torque on it in a magnetic field?The axis of the loop should be aligned with the magnetic field.Define the magnetic moment of a coil. What symbol is used and what are the SI units?Am2omNIAn=aDescribe the following parts of a DC motor:commutator:rotates with motor, provides electric contact with coil and allows forchanging direction of current flowbrushes:make electrical contact with moving commutator6 MOTION OF A CHARGED PARTICLE IN A MAGNETIC FIELDWhen a charged particle is made to move in a direction perpendicular to a magnetic field what path willit follow?...
View Full Document

Page1 / 23

MAGNETISM ANSWERS - -1-PHYSICS 212CHAPTER 19

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online