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Test Bank for College Physics 2 - Test #1 (11th edition by Hugh D Young)
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Test Bank for College Physics 2 - Test #1 (11th edition by Hugh D Young)
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Test Bank for College Physics 2 - Test#1 (11th edition by Hugh D Young)
Magnitude of an Electron's Charge - ANS1.6 x 10-19 C
When an amber rod is rubbed with fur, some of the electrons on the atoms in the fur are
transferred to - ANSthe amber
Electric charge is - ANSconserved
Electric charge is quantized in units of - ANSe
The atom that has lost an electron is now - ANSpositively charged
The atom that has gained an electron is now - ANSnegatively charged
Some materials can become - ANSpolarized
Polarized - ANSatoms rotate in response to an external charge
Conductor - ANSa material whose conduction electrons are free to move throughout. Most
metals are conductors
Insulators - ANSa material whose electrons seldom move from atom to atom. Most insulators
are non-metals.
If a conductor carries excess charge, the excess is distributed over - ANSthe surface of the
conductors
Semiconductors - ANShave properties intermediate between conductors and insulators;
properties change with their chemical composition
Photoconductive materials become - ANSconductors when light shines on them
Coulomb's law gives - ANSthe force between two point charges
In coulomb's law, the force is - ANSalong the line connecting the charges, and is attractive if the
charges are opposite, and repulsive if the charges are like.
Force unit - ANSnewton, N
, The forces on the two point charges are - ANSaction-reaction forces
Coulomb's law is also valid for - ANSspherically symmetric charge distributions as long as the
distance is measured from the center of the sphere
Electric field is - ANSforce over test charge
Electric field unit - ANSN/C
qo is a - ANStest charge (it serves to allow the electric force to be measured, but is not large
enough to create a significant force)
Force equals - ANScharge times electric field
The direction of the force depends on - ANSthe sign of the charge - in the direction of the field
for a positive charge, opposite to it for a negative one
a positive charge - ANSin the direction of the field
a negative charge - ANSopposite to the field
The electric field of a point charge points - ANSradially away from a positive charge and towards
a negative one
Electric field lines - ANS1. Point in the direction of the field vector at every point
2. Start at positive charges or infinity
3. End at negative charges or infinite
3. More dense where the field is stronger
More field lines = - ANSmore magnitude of charge
Parallel-plate capacitor consists of - ANStwo conducting plates with equal and opposite charges
Excess charge on a conductor is - ANSfree to move
Electric flux is - ANSa measure of the electric field perpendicular to the surface
Electric flux unit - ANSN * M2/C
Electric flux equals - ANSEAcos(theta)
Gauss's law states that - ANSthe electric flux through a closed surface is proportional to the
charge enclosed by the surface
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