Physics, 13.01.2020 19:31 darianhaynes

What is an electric field? how do you determine the magnitude and direction of the field at a given point?

Answers: 2

Show answers

Answers

Answer from: chloeethoma24

What is an electric field?

Electric field is a region of space in which a charged particle is under the influence of electric force.

How do you determine the magnitude and direction of the field at a given point?

Electric field is a vector quantity because an electric field has both magnitude and direction. The electric field experience by a charged particle is represented by electric field lines of force. Electric field lines of force start on positive charges and terminating on negative charges. The electric field around an isolated positive charge is drawn radially outward, because positive charges repel each other. Therefore, the field lines point away from a positive charge and towards a negative charge. The direction of the force on a positive charge is chosen arbitrarily as the direction of the electric field.

The magnitude and direction of the electric field are expressed by the value of $\overline{E}$ , called electric field strength or electric field intensity or simply the electric field.

From Coulomb's law, electric charge q₁ at position x₁ exerts a force on a particle with charge q₀ at position x₀

$\overline{F} = k\frac{q_{1}q_{o}}{r^{2}}a_{1,0}$

The electric field strength, $\overline{E}$ , at a point x₀ may be defined as the electric force $\overline{F}$ exerted per unit positive electric charge q₁ at that point.

⇒ $\overline{E} = \frac{\overline{F}}{q_{o}}a_{1,0}$

The electric field strength is;

$\overline{E} = k\frac{q_{1}}{r^{2}}a_{1,0}$ (N/C or volts/m)

where

Electric constant k = 1/4πε₀

q₁ and q₀ are electric charges

$a_{1,0}$ is the unit vector in the direction from point x₁ to point x₀

r is the distance between x₁ and x₀ of the point charges q₁ and q₀ respectively

Answer from: Quest

a.) is the correct answer.

explanation:

Answer from: Quest

Is a vector quantity that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

Other questions on the subject: Physics

Physics, 22.06.2019 02:00, gavergan

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering

Answers: 2

continue

Physics, 22.06.2019 10:20, studyowl9192

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

Answers: 1

continue

Physics, 22.06.2019 16:00, brooke0713

A( developed during the process of technology design

Answers: 3

continue

Physics, 22.06.2019 17:40, cravens511peeelg

The first-order reaction a→2b+c has rate constant 0.538 s−1. if the initial concentration of a is 0.867 mol l−1, what is the half-life of the reaction in seconds? remember to use correct significant figures in your answer (round your answer to the nearest hundredth). do not include units in your response.

Answers: 3

continue

You know the right answer?

What is an electric field? how do you determine the magnitude and direction of the field at a given...