7) Is it possible to have a zero electric field value between a negative and positive charge along the line joining the two charges? A)
Yes
, if the two charges are equal in magnitude.
When can the electric field be zero?
Explanation: To find where the electric field is 0, we take the electric field for each point charge and set them equal to each other, because that’s
when they’ll cancel each other out
. The ‘s can cancel out. Therefore, the electric field is 0 at .
Does the electric field do positive negative or zero work on the negative charge explain?
Again, note that the work done by the
electric field is positive
, and the negative charge will lose electric potential energy and gain kinetic energy as it moves against the field. A negative charge, if free to move in an electric field, will move from a low potential point to a high potential point.
Can an electric field do negative work?
Thus,
if we move a positive charge in the direction of the electric field then we do negative work
(i.e., we gain energy). But, the fixed charges cannot move, and so it is impossible to do work on them. …
Does electric field go from negative to positive?
Electric field lines always extend from
a positively charged object to a negatively charged object
, from a positively charged object to infinity, or from infinity to a negatively charged object. Electric field lines never cross each other.
Why does an electric field go from positive to negative?
Capacitors and Electric Fields
The electric field points from the positive to the negative plate- left to right. … The electric field points in the direction of the force that would be on a positive charge. An
electron will move in
the opposite direction of the electric field because of its negative charge.
Where is the electric field the strongest?
The field is strongest
where the lines are most closely spaced
. The electric field lines converge toward charge 1 and away from 2, which means charge 1 is negative and charge 2 is positive.
At which point is the electric field does zero work on a test charge?
The work done to move a charge from point A to B in an electric field is path independent, and the work around a closed path is zero. Therefore, the electric field and electric force are conservative. , with the zero reference taken to be
at infinity
.
How do you find the maximum electric field?
Strategy. Since the voltage and plate separation are given, the electric field strength can be calculated directly from the expression
E=VABd E = V AB d
. Once the electric field strength is known, the force on a charge is found using F = qE.
What is the electric field between two positive charges?
Electric field lines
point away from positive charges (like charges repel) and towards negative charges (unlike charges attract). Field lines are drawn closer together where the field is stronger.
When is work positive or negative electric field?
To find the sign of work done, check if the direction of the force and the displacement are the same or not. If they are in
the same direction, work is positive, else it’s negative
. When moved slowly, work done by an external force on a charge is always in the opposite direction of work done by the electric force.
When is electric potential positive or negative?
Note that the electrical potential energy is
positive if the two charges are of the same type
, either positive or negative, and negative if the two charges are of opposite types. This makes sense if you think of the change in the potential energy ΔU as you bring the two charges closer or move them farther apart.
What is negative potential energy?
A negative potential energy means that
work must be done against the electric field in moving the charges apart
!
When is work done electric field?
The electric force is a conservative force: work done by a static electric field is
independent of the path taken by the charge
. There is no change in the electric potential around any closed path; when returning to the starting point in a closed path, the net of the external work done is zero.
What is work done in electric field?
Work is done in an electric field
to move the charge against the force of attraction and repulsion applied to the charge by the electric field
. This work done is only dependent on the initial and final position of the charge and the magnitude of the charge.
Is external work positive or negative?
When work is done by external forces (nonconservative forces), the total mechanical energy of the object is altered. The work that is done can be
positive work or negative work
depending on whether the force doing the work is directed opposite the object’s motion or in the same direction as the object’s motion.
