PHYS 1260 EXAM 1DEWITT
QUESTIONS AND ASWERS, LATEST
UPDATED 2024 GRADE A+
Electricity - ANS-Study of electrical interactions
Electric force - ANS-The force of attraction or repulsion on a charged particle that is due
to an electric field
-Units: N
-like charges repel, opposite charges att...
, Electricity - ANS-Study of electrical interactions
Electric force - ANS-The force of attraction or repulsion on a charged particle that is due
to an electric field
-Units: N
-like charges repel, opposite charges attract
-vector (magnitude and direction)
-fundamental charge: e= 1.60E-19 C
Also, Fe=ma=qE
ϵ₀ epsilon naught - ANS-permittivity of free space
"how easily empty space forms an electric field"
8.85E-12 C^2/ N m^2
k coulombs constant - ANS-8.99E+9 N m^2/C^2
Electrostatics - ANS-The study of electric charge and electric force at rest (not in motion
(static))
Conservation of charge - ANS-Electric charge is neither created nor destroyed. The
total charge before an interaction equals the total charge after.
Coulomb's law - ANS-The relationship among electrical force, charge, and distance
-If the charges are alike in sign, the force is repulsive; if the charges are unlike, the force
is attractive.
-Coulomb (C) is the SI unit of electric charge.
-1 C is equal to the total charge of 6.25 x 10^18 electrons.
-Electric forces between charges is strongest when the charges are close together
-The electrical force between electric charges depends only on their magnitude
(strength of charge) and separation distance
Conductor - ANS-Any material that has free charged particles that easily flow through it
when an electrical force acts on them.
Insulator - ANS-A material that does not contain free charged par- ticles and through
which charge does not easily flow.
Semiconductor - ANS-A material with properties that fall between those of a conductor
and an insulator and whose resistance can be affected by adding impurities.
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