Electric Field Analogy The electric field is the
- Slides: 22
Electric Field
Analogy The electric field is the space around an electrical charge just like a gravitational field is the space around a mass.
Electric Field n Space around a charge.
What is the difference?
Van de Graaff Generator n Builds up static electric charges. n This Van de Graaff Generator was responsible for creating a field large enough to ‘fry’ our multi-media device!
Electric Field Vector, E n Electric Field is designed as follows n E = F/ qo n qo , positive test charge n E is a vector quantity n Direction indicated by small + test charge n Unit: N/C n E is analogous to the gravitational field, g, where g=F/m
Example 1 n A charge of 3µC is used to test the electric field of a central charge of 6 C that causes a force of 800 N. What is the magnitude of the electric field? n Hint… Which charge ‘tests’ the field n Answer: 2. 7 x 108 N/C
Electric Field- Diagrams Electric Field Hockey Complete pages
Electric Field Lines
Electric Field Lines of two Positive Charges
Electric Field Lines of two Positive Charges
Electric Field Lines n Lines that indicate the strength and direction of the electric field. n The more dense the lines, the stronger the field. n Electric field vectors are tangent to the curve.
Conductors and Electric Fields (under electrostatic conditions) n “The electric field is zero inside a charged conductor”. n “Excess charge on an isolated conductor resides on the surface”. n “Excess charge accumulates on sharp points”. n Electric field lines meet the conductor perpendicular to the surface of the conductor.
Shielding n The electric field is zero inside a charged conductor.
Where are you safe during a thunderstorm? A) In a car B) Outdoors or
Where are you safe during a thunderstorm? A) In a car B) Outdoors or
Which field is stronger? n. A B
Which field is stronger? n. A B
Electric Field for a Point Charge Using E=F/qo and Coulomb’s Law prove: E=k Q ______ r 2 where Q is the central charge.
Example 2 n A test charge of +3µC is located 5 m to the east of a -4µC charge. n A) Find the electric force felt by the test charge. n B) Find the electric field at that location. n Answer: 4. 32 x 10 -3 N, 1. 44 x 103 N/C along the –x axis.
Example 3 n If a test charge is moved to a location three times as far as its original location, how does the electric field change? n Inverse-Square Law says… 1/9
Example 4 n Calculate the electric field felt by a positive test charge located half way between a charge of +1 C and a charge of -3 C, that are 2 m apart. n Answer: 3. 6 x 1010 N/C (toward the -3 C charge)
- Electric field analogy
- Electric field analogy
- Chapter 21 electric charge and electric field
- Electric field lines
- Unit of charge
- Electric field and electric potential
- Dc o/d per item charge
- Equation for electric potential energy
- Chapter 21 electric charge and electric field
- Potential difference formula
- Q factor of capacitor
- Difference between electric field and magnetic field
- Electric field and magnetic field difference
- Electric potential
- Analogy between electric and magnetic circuit
- Analogy between electric and magnetic circuits
- Ev to volt
- Analogy circuit
- Electric charges and electric forces lesson outline
- A suitable electric pump in an electric circuit is a
- Electric field pn junction
- Coulomb's equation
- Curly electric field