Magnetic Fields and Forces 24 10 24.1 Magnetism 1. The compass needle below is f

Question

Magnetic Fields and Forces 24 10 24.1 Magnetism 1. The compass needle below is free to rotate in the plane of the page. Either a bar magnet or a charged rod is brought toward the center of the compass. Does the compass rotate? If so, does it rotate clockwise or counterclockwise? If not, why not? a. b, Pivot Pivot Bar magnet Charged rod Clockwit 2. You have two electrically neutral metal cylinders that exert strong attractive forces on each other. You have no other metal objects. Can you determine if both of the cylinders are magnets, or if one is a magnet and the other just a piece of iron? If so, how? If not, why not? 24-1

Explanation / Answer

1 a)It rotates in counter clockwise direction.

Reason:North pole of magnet repels North pole of compass and south pole of compass is attracted by magnet,thereby moving the compass in counter clockwise direction.

1 b)since the charge of rod is static no magnetic field is created.(magnetic field is created by only moving charges i.e current)

Hence the compass will not rotate.

2)one is a magnet and other is a piece of iron.if they both were magnets there would be repulsive force when same poles are placed in line and attractive only when opposite poles are placed in line.

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