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14 Cards in this Set
- Front
- Back
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Define Electric charge
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An inherent physical propery of certain subatomic particles that is responsible for electrical and magnetic phenomena. measured by coulomb.
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Define Coulomb's law
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F x q1q2/d2
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Define Voltage
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V= work/q
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Define current
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The rate of flow of electric charge. current = charge/time
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Define resistance
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A measure of the opposition to curent flow.
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Define Ohm's law
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The current in a circuit equals the voltage divided by the resistance.
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Define Alternating current (AC)
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two output terminals switches back and forth
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Define Direct current(direct)
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current flows out of positive terminal and moves through the circut and into the negitive termal
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All matter contains both positively and negatively charged particles. Why do most things have no net charge?
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would be zero if q = -1 C + 1 C = 0C
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What is a positive ion? A negatie ion?
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negative is when a atom has more neg electron than pos. positive ion is it has more pos electrons than neg
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Describe the similarities and the differences between the gravitation force between two objects and the electrostatic force between them? What would happen if they were moved closer together or farther apart?
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1
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What is an electric field? Sketch the shap of the electric field around a single proton.
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1
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At one moment during a storm, the electric field between two clouds is directed toward the east. What is the direction of the force on any electron in this region? What is the direction of the force on a positive ion in this region?
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1
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Materials can be clasified into four categories based on the ease with which charges can flow through them. Give the names of these categories and describe each one.
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insulator-wood rubber conductor- metals semiconductors- silicon and germanium. superconductiveity- element, compounds and metal alloys
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