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