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29 Cards in this Set
- Front
- Back
What is induction?
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the process of charging a conductor by bringing it near another charged object and grounding the conductor, allowing the electrons to leave
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What property was discovered in Millikan's experiment? Explain this property.
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With an oil drop experiment: discovered THAN WHEN AN OBJECT IS CHARGED, ITS CHARGE IS QUANTIZED
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How are gravitational force and electrical force alike AND different?
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alike: both exerted w/out contact; thus a field force
different: electric is either attractive or repulsive. Gravitational is only attractive. -Electrical forces are much stronger than gravitational forces |
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What are the 2 types of electric charge?
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positive and negative
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What is a positive ion?
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cation
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What is a negative ion?
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anion
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What are charged particles called?
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ions
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What is an electron's charge?
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1.6 E -19 C
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What is an Electron's charge and mass?
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charge: -1.6 E -19 C
mass: 9.109 E -31 kg |
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What is an Proton's charge and mass?
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charge: +1.6 E -19 C
mass: 1.673 E -27 kg |
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What is a conductor?
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a material that charge can travel through easily (think: free electrons)
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What is an insulator?
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a material that charge cannot readily travel through
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What is grounded?
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when a conductor is placed in contact w/ the earth. When this happens, charge flows freely and is redistributed (cancels out)
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What is polarization?
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In the presence of a charged object, the centers of charge for an insulator will shift, resulting in more positive charge on one side of a molecule than on the other
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Is there a note charge for a polarized object?
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NO, dude
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In polarization, can electrons leave?
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no, dude, seriously?
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Polarization only works in _________
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insulators
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What is sigma Σ
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sum of all electric forces
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What is the equilibrium position of a charge?
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the location at which the net electric force on the charge is zero
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What's an electric field?
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a region in a space around a charged object in which a stationary charged object experiences an electric force because of its charge
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Is E a vector or scalar?
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VECTOR, dude
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What are electric field lines?
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lines that represent both the magnetic & the direction of the electric field
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On electric field lines, a GREATER # OF LINES MEANS:
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a stronger electric field
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What is electric potential?
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Voltage
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What is Voltage?
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electric potential, lolzers
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What can a capacitor do?
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-tune frequency of radio receivers -eliminate sparking in car ignition systems
-store electricity in electronic flash units -capacitors act as a storehouse of charge and energy |
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What is capacitance:
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the ability of a conductor to store energy in the form of electrically separated charges
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Capacitance also depends on:
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size & shape of the capacitor
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What increases the capacitance of the capacitor?
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Dialectic
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