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Quiz von John Anthony Yumul, aktualisiert more than 1 year ago
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Erstellt von John Anthony Yumul
vor fast 6 Jahre
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Frage 1
Frage
The electric potential inside an isolated conductor could be ___________
Antworten
-
Zero
-
Changing
-
Constant
-
more than one of the choices
Frage 2
Frage
Pushing a positively charged particle towards another fixed positively charged particle.
Antworten
-
exerts negative work
-
exerts positive work
-
exerts no work
Frage 3
Frage
The electric flux trough a closed surface depends on the following except ________.
Antworten
-
magnitude of the charged enclosed by the surface
-
the shape of the surface
-
magnitude of the charged outside the surface
-
more than one of the choices
Frage 4
Frage
The net torque on a current loop subjected to a magnetic field is _________
Antworten
-
never zero
-
always zero
-
sometimes zero
-
cannot be determined
Frage 5
Frage
The electric field outside a coaxial cable mus be _________
Antworten
-
zero
-
maximum
-
same as E field inside the inner conductor
-
more than one of the choices
Frage 6
Frage
The delayed reaction of the magnetization with the change of magnetizing force is called ______
Antworten
-
polarization
-
hysteresis
-
magnetization
-
relaxation time
Frage 7
Frage
The magnetic force must be zero when the velocity is ________
Antworten
-
perpendicular to B
-
zero
-
parallel to B
-
more than one of the choices
Frage 8
Frage
The electric flux through a surface will be zero when the angle between the electric field and the area unit vector is _______
Antworten
-
0 degrees
-
30 degrees
-
180 degrees
-
90 degrees
Frage 9
Frage
The polarization vector has the same unit as the __________
Antworten
-
electric flux
-
electric field
-
electric flux density
-
electric potential
Frage 10
Frage
Two parallel wires are said to have one Ampere if the force per unit length experienced by the wire is _________
Antworten
-
2 x 10^-7 N/m
-
2 x 10^7 N/m
-
2 x pi x 10^7 N/m
Frage 11
Frage
The capacitance of an isolated spherical capacitor is independent on its
Antworten
-
radius
-
potential
-
charged
-
more than one of the choices
Frage 12
Frage
The movement of charges in a vacuum
Antworten
-
is a form of conduction current
-
does not obey Ohm's law
-
is electrostatically neutral
-
more than one of the choices.
Frage 13
Frage
Inductors _____________ variations in __________ through a circuit.
Antworten
-
oppose; current
-
oppose; voltage
-
aid; current
-
aid; voltage
Frage 14
Frage
The following are always zero for a conductor in electrostatic equilibrium except
Antworten
-
net current
-
net electric field
-
surface charge density
-
potetial difference
Frage 15
Frage
A material with higher residual magnetism is said to have a good __________, which is the ability to retain magnetism when magnetizing force to removed
Antworten
-
hysteresis
-
remanence
-
magnetization
-
dipole moment
Frage 16
Frage
The energy density of an electric field is ________ the energy density of the magnetic field in a vacuum.
Antworten
-
equal to
-
greater than
-
less than
Frage 17
Frage
Which of the following is a unit of magnetic field intensity?
Antworten
-
maxwell
-
tesla
-
gauss
-
oersted
Frage 18
Frage
If the current in a parallel conductor are the same, the 2 conductors will
Antworten
-
attract
-
either repel or attract
-
repel
-
neither attract nor repel
Frage 19
Frage
If a test charge is moved on an equipotential surface there is
Antworten
-
zero work
-
negative work
-
positive work
-
a change in potential energy
Frage 20
Frage
The charge in the plates of a capacitor establish _____
Antworten
-
Current
-
Electric Field
-
Potential difference
-
more than one of the choices
Frage 21
Frage
With steady electric current, as the velocity increases , the charge density ___________
Antworten
-
increases
-
remains the same
-
decreases
-
becomes zero
Frage 22
Frage
A point charge Qa is moved aong a circular loop around another fixed point charge Qb at a distance of constant radius. The work done is zero ______
Antworten
-
when the 2 charges have the same magnitude
-
when the 2 charges have the same poalarity
-
when the 2 charges have opposite polarity
-
all of the choices
Frage 23
Frage
Resistance depends on the following except
Antworten
-
dimension
-
both the choices
-
material
-
neither of the choices
Frage 24
Frage
The following statements implies that charges are conserved except
Antworten
-
charges exist as exact multiple of the charge electron
-
the smallest quantity of charge is the charge of an electron
-
algebraic sum of all charges in a closed system is constant
-
more than one of the choices
Frage 25
Frage
A flux of 10^-8 weber is passing through a surface. There must be ______ magnetic field line/s passing through it.
Antworten
-
10^8
-
1
-
10^-8
-
0
Frage 26
Frage
When the charge on the plate increases, the capacitance ______
Antworten
-
increases
-
decreases
-
remains the same
Frage 27
Frage
If the charges are the same, the forces must be ________.
Antworten
-
attractive
-
zero
-
repulsive
-
cannot be determined
Frage 28
Frage
The electric field at 4m due to an infinite sheet of charge is ___________ that of the electric field at 8m.
Antworten
-
half
-
twice
-
four times
-
the same
Frage 29
Frage
COnductance is to electric circuits as _______ is to magnetic circuit
Antworten
-
magnemotive force
-
magnetic flux
-
permeance
-
permeability
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