Conceptual Physics Reading and Study Workbook, Chapter 32 – Flashcards
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The electrical force is much stronger than...
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the gravitational force
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You don't feel the electrical forces that act on you all the time because...
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since both repelling and attracting forces act on you, the forces cancel out
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According to the modeled atom proposed in the 1900s by Rutherford and Bohr...
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the atom has a positively charged nucleus surrounding my electrons; the protons attract and hold the electrons in orbit
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Charge is..
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the fundamental electrical property to which the mutual attractions or repulsions between electrons or protons is attributed
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The magnitudes of a proton's charge and an electron's charge are always..
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equal and never change
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Like charges...
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repel
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Opposite charges...
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attract
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There is no net charge in neutral atoms because...
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there are as many electrons as protons, so therefore, the charges balance
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A charged atom is called an...
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ion
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The outermost electrons of many atoms are...
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bounded very loosely to an atom and can be easily dislodged
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If a rubber rod is rubbed by a piece of fur, the rubber becomes..
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negatively charged
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If a rubber rod is rubbed by a piece of fur, the fur becomes...
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positively charged
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The principle of conservation of charge is that...
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electrons are neither created nor destroyed, they are simply transferred from one material to another
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The SI unit of charge is the...
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coulomb
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A material through which electric charge can flow is an...
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electric conductor
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A material that is a poor conductor of electricity is an..
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electric insulator
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A semiconductor is...
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a material that can be made to behave sometimes as insulators and sometimes as conductors
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Atoms in a semiconductor hold their electrons until...
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the atoms of the semiconductor are given small energy boosts
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The ground is...
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(practically) an infinite reservoir for electric charge
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Benjamin Franklin discovered...
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that lightning is an electric phenomenon
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The force of attraction for the closer charge is greater than..
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the force of repulsion for the farther charge
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When you rub an inflated balloon on your hair and it becomes positively charged, the charge on the balloon induces...
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a positive charge on the surface of the wall
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The three way that and object can become electrically charged is...
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by friction, by contact, and by induction
