Suppose a hallow metal sphere has a large negative charge on it. The electric field strength inside the sphere is
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increases
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A Small positively charged object near a positively charged sphere is moved closer to the sphere. The electric potential energy of the small object
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One proton and one electron
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The common hydrogen atom consists of
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False
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T or F: When an object is charged by induction, electrons flow from the ground onto the object, or fro the object onto the ground
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Both directly on the magnitude of the charges and inversely on the square of the distance between the charges
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Coulomb's law says that the force between any two charges depends
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Electric Dipoles
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The charge distribution in some molecules is permanently separated in two regions, such molecules are called
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True
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T or F: Electric charge is neither created or destroyed but can be rearranged
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True
Front
T or F: The energy a charge possesses by virtue of its location is called electric potential energy
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False
Front
T or F: The direction of lines of force shows how large a force will be on a charge placed in an electric field
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Position
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Electric potential energy is the energy a charged object has because of its
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False
Front
T or F: Electrons and protons have the same charge and therefore attract each other
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More protons than electrons
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A positive ion has
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0.40N
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The electrostatic force between the two charges located 2 meters apart is 0.10 N. What will the force be between these charges when they are located 1 meter apart
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Magnitude and Direction
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An electric field has..
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The direction of the force on a test positive charge
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The direction of the force would act on a proton placed in both an electric field and gravitational field
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False
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T or F: A material is a good insulator if outer electrons of atoms in the material are free to roam around
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20N
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A 2-C charge and a 4-C charge attract each other with 10 N of force. How much will a 2-C charge and and 8-C charge attract each other when placed the same distance apart
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Two
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How many different kinds of force would act on a proton placed in both an electric field and a gravitational field.
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False
Front
T or F: an atom that is electrically polarized vibrates in only one direction
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Zero
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The net charge of an non ionized atom atom is
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Induced opposite charges in the wall are closer than other wall charges
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The reason a charged balloon will stick to a wall is that
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Distributed evenly over the sphere's surface
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Suppose you touch a negatively charged object to a metal sphere so that electrons move from the charged object onto the sphere. After far separation of the charged object, electrons on the sphere will be
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Protons and Neutrons
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Atomic nuclei of almost all atoms consist of
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False
Front
T or F: The unit of electric potential is the joule
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-1.6x10^-15
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10,000 electrons are removed from a neutral plastic ball. What is the charge of the ball?
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Accelerate away from each other
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If two negative charges are held close together and then released, the charges will
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True
Front
T or F: When a change is placed in an electric field, the charge will experience a force.
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Tightly bound in place
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In a good insulator, electrons are usually
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True
Front
T or F: Even though a car may be struck by lightning, people inside the car will be safe