FAQ

What is the electric field at the halfway point between the two charges?

What is the electric field at the halfway point between the two charges?

At the midpoint of the line joining two equal point charges, the field is zero, and the electric field lines on this line joining the charges each begin at a charge and kind of end at the midpoint.

What happens when two charges are placed near each other?

Like charges repel each other; unlike charges attract. Thus, two negative charges repel one another, while a positive charge attracts a negative charge. The attraction or repulsion acts along the line between the two charges. If the charges come 10 times closer, the size of the force increases by a factor of 100.

What is the value of the electric field at a point halfway between the equal positive charges?

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At the midpoint between the charges, the electric field due to the charges is zero, but the electric potential due to the charges at that same point is non-zero. The potential either has two positive contributions, if the charges are positive, or two negative contributions, if the charges are negative.

What is the electric field between two 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. Field lines do not touch or cross each other. Field lines are drawn perpendicular to a charge or charged surface.

What is a two point charge?

It allows the calculation of electromagnetic fields with arbitrary charge distributions. One configuration is of particular interest – two separated point charges of opposite charge. Its field fundamentally differs from that of just a single charge even though it is just the sum of the charge.

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What would happen if 2 identical bodies of opposite charges come in contact?

Oppositely charged objects will exert an attractive influence upon each other. In contrast to the attractive force between two objects with opposite charges, two objects that are of like charge will repel each other. This repulsive force will push the two objects apart.

How does the electric field of two negative charges compare to the electric field of two positive charges?

(a) Two negative charges produce the fields shown. It is very similar to the field produced by two positive charges, except that the directions are reversed. The field is clearly weaker between the charges. The individual forces on a test charge in that region are in opposite directions.

What is the potential at the center of two equal charges?

It is positive for positive charge and negative for negative charge with our choice of zero potential at infinity. Being scalar, potential has to be added algebraically. Thus potential V at the centre of two equal positive charges, each of magnitude q placed at a distance 2a is given by

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Is it possible to have zero potential between two charges?

Potential is not a vector quantity so between two like charges you can’t have zero potential like yoy have in case of Electrical field. Potential at any point due to a charge is proportional to its magnitude and inversely proportional to distance from the point charge. For two positive charges the two potential would add.

Are two point charges separated by a distance?

Question: Two point charges, and , are separated by a distance . What is the electric field at a point halfway between the charges? What force would be exerted on a third charge placed at this point?

What is the force between two equal charges on a particle?

You comment about two equal charges is correct – the field midway between them is zero (by symmetry) and so there is no net force on a test particle. The zero of potential is arbitrary and has no physical consequence (potential is the integral of the field, so you get a constant of integration).