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3 Cards in this Set
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- Back
- 3rd side (hint)
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The force between the south pole of a magnet and the north pole of a magnet is measure. If the distance between the poles is increased by a factor of 3, how does the new force compare to the old one? Is the force attractive or repulsive?
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If the distance is increased by a factor of 3, the force decreases by a factor or 9. Since the poles are opposite, it is an attractive force.
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The electromagnetic force is inversely proportional to the distance between the objects.
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Two charged particles are placed 10 centimeters from each other and the resulting force is measured. The charge on Object #1 is then doubled and the charge on object #2 is left the same. The distance between the objects is also reduced to 5 centimeters. How does the new force compare to the old force?
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The total charge is 2x4 = 8. The new force is 8 times stronger than the old one.
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When the first charge is doubled, the force is doubled. Since the second charge is left the same, there is no change with respect to that charge. The force varies inversely with the square of the distance between objects. Thus, if the distance is halved, the force increases by a factor of 4.
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What causes the electromagnetic force?
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The exchange of protons causes the electromagnetic force.
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