Cada pregunta de este test está cronometrada.
The work done in moving a charge in an equipotential surface is ___________.
always zero
sometimes zero
never zero
cannot be determined
The electric field is directed ____________.
along equipotential surfaces
from higher to lower potential
from positive to negative charges
more than one of the choices
The change in potential energy of a unit charge between 2 points in an electric field ________
Electric potential difference
Work
Electric field density
None of the choices
The law of conservation of charge implies ________.
Electrons are not created or destroyed
Charge is simply transferred from one thing to another
Charge is conserved
All of the above
The relative permittivity of free space is ?
0
1
either 0 or 1
A point charge Q is moved along a circular path around another fixed point charge. The work done is ______.
when all the charges are of the same magnitude
when the charges are dipoles
when Q returns to the starting point
all of the above
If charges are similar, the force must be __________
attractive
repulsive
neither of the two
The ability of charged bodies to exert force on one another is attributed to the existence of ____.
Electrons
Electric Field
Protons
It is the energy of a charged object possessed because of its location in an electric field. _________.
Electric Field Intensity
Electric Potential Energy
Which of the statements is true?
Particle A has twice the charge of particle B. Particle A exerts on force B that is twice as B.
The work done in an equipotential surface is sometimes zero
If a positively charged metallic rod touches a neutral metallic sphere. The electrons will move from sphere to rod.
none of the choices
