Chapter 7 Electric Current

22 Questions  I  By Sfarthing on December 16, 2009
Chapter 7 electric current

  

Question Excerpt

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1.  The current in a circuit equals the voltage difference divided by the resistance.
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2.  A source of voltage difference, such as a battery, a device such as a lightbulb that has resistance and conductors that connects the device to the battery terminals.
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3.  A way to measure the resistance of objects and materials.
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4.  Electric current loses energy as it moves through the filament because the filament ____ the flow of ____.
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5.  How does Ohms Law work?
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6.  Resistance is the tendency for a material to _____ the flow of _____ changing electrical energy into ____ energy and light.
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7.  Six wet cells made up of lead and lead dioxide plates in a sulfuric acid solution.
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8.  Lead acid batteries provides a voltage difference of ___ volts.
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9.  Part of the circuit through the bulb is a thin wire called a ______.
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10.  As the electrons flow through the filament, they bump into the metal atoms that make up the filament.  In these collisions, some of the electrical energy of the electrons is converted into ______ ______.  This is called _______.
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11.  Contains two connected plates made of different metals or metallic compounds in a conducting solution.
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12.  What happens to two terminals of a dry-cell battery connected in a circuit involving zinc and several chemicals in the paste.
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13.  The net movement of electric charges in a singe direction.
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14.  T  or  FThere is no met movement of electrons in one direction.
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15.  A  ____ ____ is related to the force that causes electric charges to flow.
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16.  Voltage difference is measured in _____.
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17.  A closed path that electric current follows is?
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18.  A _____ can provide the voltage difference that is needed to keep current flowing in a circuit.
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19.  T  or F Current flows as long as there is a closed path that connects one battery terminal to the other battery terminal.
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20.  A cell consists of two electrodes surrounded by a material called an ________.
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21.  T or FThe electrolyte enables charges to move from one electrode to the other.
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22.  T  or FWet cell batteries contain electrolytes which contains the least amount of paste chemicals.
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