- What is an electric field and how is it created?
- What is the formula of work done?
- What is the formula of time?
- What is the formula of distance?
- How is voltage related to electric field?
- What is electric field proportional to?
- What is E mc2 used for?
- Does an electric field do work?
- What is the formula for energy?
What is an electric field and how is it created?
Electric fields originate from electric charges, or from time-varying magnetic fields.
The electric field is defined mathematically as a vector field that associates to each point in space the (electrostatic or Coulomb) force per unit of charge exerted on an infinitesimal positive test charge at rest at that point..
What is the formula of work done?
When the force F is constant and the angle between the force and the displacement s is θ, then the work done is given by W = Fs cosθ. Work transfers energy from one place to another, or one form to another. The SI unit of work is the joule (J).
What is the formula of time?
Rate of change in position, or speed, is equal to distance traveled divided by time. To solve for time, divide the distance traveled by the rate. For example, if Cole drives his car 45 km per hour and travels a total of 225 km, then he traveled for 225/45 = 5 hours.
What is the formula of distance?
Learn how to find the distance between two points by using the distance formula, which is an application of the Pythagorean theorem. We can rewrite the Pythagorean theorem as d=√((x_2-x_1)²+(y_2-y_1)²) to find the distance between any two points.
How is voltage related to electric field?
In other words, the difference in voltage between two points equals the electric field strength multiplied by the distance between them. … The interpretation is that a strong electric field is a region of space where the voltage is rapidly changing.
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 is E mc2 used for?
Einstein’s equation E = mc2 shows that energy and mass are interchangeable. The theory of special relativity explains how space and time are linked for objects that are moving at a consistent speed in a straight line. One of its most famous aspects concerns objects moving at the speed of light.
Does an electric field do work?
When a charged particle moves from one position in an electric field to another position in that same electric field, the electric field does work on the particle. The work done is conservative; hence, we can define a potential energy for the case of the force exerted by an electric field.
What is the formula for energy?
The formula that links energy and power is: Energy = Power x Time. The unit of energy is the joule, the unit of power is the watt, and the unit of time is the second.