Answer and Explanation: Answer: Electric force is directly proportional with 1r2.
although, How do you find r in electric force?
The electric field E is defined to be E=Fq E = F q , where F is the Coulomb or electrostatic force exerted on a small positive test charge q. E has units of N/C. The magnitude of the electric field E created by a point charge Q is E=k|Q|r2 E = k | Q | r 2 , where r is the distance from Q.
Besides, Is electric field directly proportional to?
For a charge concentrated nearly at a point, the electric field is directly proportional to the amount of charge; it is inversely proportional to the square of the distance radially away from the centre of the source charge and depends also upon the nature of the medium.
however Can electric field lines cross? Electric field lines cannot cross. … This is because they are, by definition, a line of constant potential. The equipotential at a given point in space can only have a single value. If lines for two different values of the potential were to cross, then they would no longer represent equipotential lines.
so that Is electric field dependent on radius?
The surface area of a sphere is proportional to its radius squared, while the electric field of a point charge is inversely proportional to that same quantity. … The circumference of a circle is proportional to its radius and the magnetic field just described is inversely proportional to radius.
Is electric force attractive or repulsive? Second, gravitational forces are only attractive; electrical forces can be either attractive or repulsive. The inverse square relationship between force and distance that is woven into the equation is common to both non-contact forces.
Table of Contents
What direction do electric fields travel?
The direction of the electric field is always directed in the direction that a positive test charge would be pushed or pulled if placed in the space surrounding the source charge. Since electric field is a vector quantity, it can be represented by a vector arrow.
What is K in electric field?
The Coulomb constant, the electric force constant, or the electrostatic constant (denoted ke, k or K) is a proportionality constant in electrostatics equations. In SI units it is equal to 8.9875517923(14)×109 kg⋅m3⋅s−2⋅C−2.
What is electric field proportional to?
For a charge concentrated nearly at a point, the electric field is directly proportional to the amount of charge; it is inversely proportional to the square of the distance radially away from the centre of the source charge and depends also upon the nature of the medium.
What determines how strong an electric field is?
The electric field strength is dependent upon the quantity of charge on the source charge (Q) and the distance of separation (d) from the source charge.
Can electric field be negative?
Electric field is not negative. It is a vector and thus has negative and positive directions. An electron being negatively charged experiences a force against the direction of the field.
Why do electric lines never cross?
Electric lines of force never intersect because, at the point of intersection, two tangents can be drawn to the two lines of force. This means two directions of the electric field at the point of intersection, which is not possible.
Can an electric field be zero?
There is no zero-field point for a pair of equal-magnitude-but-opposite-sign charges. Electric field is zero in that point because the sum of electric field vectors have same intensity and direction, but are opposite. That point is halfway between two like charges.
Why can’t magnetic field lines cross?
Magnetic field lines originate from the north pole and merge at the south pole. As the distance between the poles tends to increase, magnetic line density reduces. … Magnetic lines do not intersect with one another. The magnetic lines strength is the same throughout, and it is proportional to how near the lines are.
What is r hat in electric field?
The unit vector, r-hat. Define a unit vector r which points away from the charge. ^ so electric field points away from + charge. and towards – charge.
How do you know if an electric field is positive or negative?
If the charge is positive, field lines point radially away from it; if the charge is negative, field lines point radially towards it. Electric field of positive point charge: The electric field of a positively charged particle points radially away from the charge.
Is gravity repulsive or attractive?
Both in the Newton theory of gravitation and in the General Theory of Relativity the gravitational force is exclusively attractive one. However, the quantization of gravity shows that the gravitational forces can also be repulsive [3].
What is the difference between attractive and repulsive force?
Attraction is a force between two charges that are distinct or unlike. Because the nuclei are positive and the electrons are negative, the electrons are attracted to the nuclei. … Repulsive forces occur only when atoms are very close to each other.
How do you know if it is repulsive or attractive?
If both the interacting particles are positively or negatively charged, then the force is repulsive. If both the interacting particles are of opposite charges then the force is attractive in nature.
Why do electric field never cross?
Electric field lines cannot cross. … This is because they are, by definition, a line of constant potential. The equipotential at a given point in space can only have a single value. If lines for two different values of the potential were to cross, then they would no longer represent equipotential lines.
What pushes charges through a wire?
It’s a complicated process, but there are charges inside wires and these charges can be acted on by an electric field. They can move through the wire in something that’s called an electric current. Moving charge is an electric current and we use that to push power through wires.
What is K in Hooke’s Law?
The rate or spring constant, k, relates the force to the extension in SI units: N/m or kg/s2.
What is K in electric charges?
The symbol k is a proportionality constant known as the Coulomb’s law constant. The value of this constant is dependent upon the medium that the charged objects are immersed in. In the case of air, the value is approximately 9.0 x 109 N • m2 / C2.
Where is the strongest electric field?
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.
Where would a test charge feel the strongest electric force?
The closeness of the lines is directly related to the strength of the electric field. A test charge placed anywhere will feel a force in the direction of the field line; this force will have a strength proportional to the density of the lines (being greater near the charge, for example).
Discussion about this post