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18 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What are the 3 types of magnets
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1. natural
2. permanent - artificial 3.electomagnet - temporary |
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List 3 laws of magnetism
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1. poles - north and south
2. likes repel, unlikes attract 3. Force of attraction - inverse square law |
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What is magnetic induction?
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when a non-magnetized iron object comes into a magnetic field it becomes magnetic assuming the opposite pole of the 1st magnet
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What is electromagnetic induction?
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Creating electricity through magnetism
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When a metallic object becomes magnetized easily it is said to be
_____________. |
Permeable
When an metallic object retains its magnetism it is said to be _________. |
Retentive
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What is electrostatics?
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The study of the distribution of fixed charges, or electrons at rest
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What are the 5 laws of electrostatics?
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1. Like charges repel and unlike charges attract.
2. Electrical charges reside only on the external surface of the conductor. 3. Concentration of charges are greater on the curved surface where the curvature is greatest. 4. Only negative electrons move in a solid conductor. 5. Inverse square law electrostatic force between two charges is directly proportional to the product of their magnitudes and inversely proportional to the distance squared between them. |
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What are the 3 ways that objects can be electrified (charged)?
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1. By friction
2. By contact 3. By induction |
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Electrodynamics is defined as.....
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electrons that are moving predominately in the same direction, which is also called......
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current
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Name the 4 conditions under which charges flow
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1. vacuum
2. gases 3. ionic solutions 4. metallic conductors |
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3 factors to consider on an electric circuit
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1. ampere
2. volts 3. resistance |
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What is a semiconductor?
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a substance that conducts under certain conditions and insulates under others
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Ampere is a measurement of what?
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current
1 ampere is 1 coulomb of electrical charge flowing which equals how many electrons per second? |
6.24 x 10 to the 18th power
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Voltage is described as ...
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Potential Difference or EMF, which is....
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Electromotive force, which is a unit of quantity and unit of force
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Resistance is measured in what unit?
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Ohms
What affects resistance? |
1. type of conductor
2. length of the conductor 3. cross section of the conductor 4. temperature of the conductor |
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What is Ohm's law?
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I = V/R
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How do we measure power?
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In Watts
P = IV power equals current times voltage |
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How do we determine the total resistance of a circuit in series?
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total up all the resistance on the circuit
How about a parallel circuit? |
the sum of the reciprocal of each element is inversely proportional to the sum
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