10 Chapter review Flashcards
Why does rubbing a balloon on your sweater allow the balloon to stick to a wall or ceiling?
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What weather condition helps static charge build up in objects such as clothing? Why?
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How can an insulator, like wool, lose electrons to acquire a positive charge?
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Why do lines of force point away from a positive charge?
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Contrast the movement of charges in insulators & conductors during induction when a charge object is brought NEAR them.
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Describe how an electroscope becomes positively charged.
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Why do static, or stationary, charges (electrons) move? Describe the duration of their motion.
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How can you increase the amount of charge a Leyden jar stores?
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When smoke passes through an electrostatic precipitator, the uncharged smoke particles are attracted to the charged plates in the device. What electrical process causes the particles to act this way?
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How are electrostatic precipitators an example of dominion science?
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List five electrical devices that don’t need to be plugged into an electrical outlet to operate.
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How does the flow of electrons in an electrochemical cell differ from that in a PV (photovoltaic) cell?
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List three kinds of energy to which electrical energy can be converted.
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How much electrical power absorbed in a wire (P = IIR)(i is squared) change if the current triples? How does a wire eliminate the excess energy?
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What three devices reduce the likelihood of an electrical fault starting a fire?
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How do GFCI outlets protect from electrocutions?
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(T or F) Like charges attract, opposite charges repel.
F
(T or F) In the electric-field model, lines of force start at positive charges and end at negative charges.
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(T or F) You can be sure that two objects that electrostatically attract have opposite charges.
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(T or F) In a charged electroscope, one of the foil leaves has a positive charge & the other a negative charge.
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(T or F) Electrostatic charges build up when electrons are transferred from one object to another.
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(T or F) A lightning rod is made from a good insulating material.
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(T or F) A capacitor is a modern version of the Leyden jar.
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(T or F) Benjamin Franklin assigned the negative charge to the electron.
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(T or F) Wet cells can be recharged after they are “dead.”
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(T or F) An electrical generator is like a water pump that pumps water to the top of a hill so that it can flow down again.
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(T or F) Opening a switch in a parallel branch of a circuit will turn off the entire circuit.
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(T or F) The earth can be considered an infinite source or sink of electrons.
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A typical flashlight bulb has a resistance of 60 Ohms. If the bulb is used in a 6.0 V flashlight, how much current will it draw?
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How much power does the light bulb in the previous question use?
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