Electric Field.

Slides:

Advertisements

Similar presentations

R3-1 Physics I Review 3 Review Notes Exam 3. R3-2 Newton’s Law of Universal Gravitation.

Advertisements

…and all the pretty variations… F = k q 1 q 2 r2r2 E = k q 1 r2r2 U = k q 1 q 2 r V = k q 1 r.

Chapter 25 Electric Potential

Daily Warm-Up How is the size of the force acting on two charges related to the distance between the charges? How is the size of the charges related to.

Honors Physics Mr. Payne April 30, Today: Uniform Fields – Gravitational and Electrical – Homework: Problems 5, 6, 11, 12, page 489 – (Problems.

Electric Potential Energy or Potential Difference (Voltage) Recall the idea of Gravitational Potential Energy: lifting an object against gravity requires.

Electrical & Gravitational Force. Newton’s Universal Law of Gravitation Every object in the universe attracts every other object with a force that for.

Electric Fields.

Electrostatic Forces Homework: Complete handout. Magnitude of Force According to Coulomb’s Law  The magnitude of force exerted on a charge by another.

Field Definition And Coulomb’s Law

Electric Fields and Forces

Electric Potential Energy and the Electric Potential

Electric Forces, Fields and Energy Ch. 17 & 18 Test.

© John Parkinson 1 2 Electric Field "An electric field is a region in which charged particles experience a force" ELECTRIC FIELD +Q FORCE -Q FORCE Lines.

PARALLEL PLATES. From previous work, the electric field strength can be found from the electric force on a test charge.

The Electric Field Some Introductory Notes The magnitude and strength of Electric fields and Gravitational fields vary inversely with the square of the.

Electric Field magnitude of the electric force on a small, positive test charge divided by the magnitude of that test charge direction of the electric.

Electric Potential and Electric Fields. Sections Covered – Chapter 33 Topics Covered – Electric Fields – Electric Field Lines – Electric Shielding – Electric.

Ch 17: Electric Potential Ch 17 introduces the idea of electric potential (also called Voltage)

ELECTROSTATICS REVIEW QUESTIONS. The gravitational force is ________________than the electrical force.

Potential Energy Physics 12. Potential Energy In grade 11 physics we looked at Gravitational Potential Energy In grade 11 physics we looked at Gravitational.

Gravitational Potential Energy Gravitational Potential B Fg = mg Gravitational Potential A The particle with a given mass will have more G.P.E at pt B.

Work Work done is a measure of the energy transferred. E.g. when lifting a pencil I do work against the earth’s gravity force, energy has been transferred:

Static Electricity, Electric Forces, Electric Fields.

1. What is the force on, and the electric field surrounding (magnitude and direction) an electron if it is accelerated upward at 5.20x10 15 m/s/s? (4.74x10.

Potential Energy Review of Work Work is the product of force and distance. W = Fd If work is done on an object its energy is changed If the work done.

Gravitational Potential Energy Gravitational potential energy (near the surface of Earth) depends on the mass and height of an object.

Energy and Work. Work… Work = Force // x Displacement W = F // x d ** Remember that displacement is the distance AND direction that something moves. It.

Physics 30 Unit 2 Review Electrical Forces and Fields.

Gravitation © David Hoult 2009.

Electric Potential Energy & Capacitance

Electric Potential Energy and Potential Difference

Electrical Potential.

DEFINITIONS: ELECTROSTATICS, ELECTRIC FIELDS and ELECTRIC CIRCUITS

Aim: How do Charges behave in an Electric Field?

Electric Potential Difference Or Voltage

Electric Fields and Potential

Electric Fields Review Coulomb’s Law Electric Fields

Electric Potential Between Charged Plates

Electric Fields and Forces

Electric Fields.

IB Physics SL Y2 Thursday, August 21, 2014

Electric Fields and Potential

Electric Field Physics Mr. Dellamorte.

Electric Fields.

Introduction to Forces

How do electrons know what to do?

Changes in energy stores

Electric Fields and Forces

Forces and Fields Lesson 6

Mechanical Energy Kinetic Energy, energy of motion,

Electrical Energy & Capacitance Pgs

Chapter 17 Electric Potential.

REVISION ELECTROSTATICS.

Bell Work: Electric Fields

Electric Field The electric force is a field force, it applies force without touching (like the gravitational force) In the region around a charged object,

Lesson 3: Electric Fields

Physics 133 Electromagnetism

Unit 2 Particles and Waves Electric Fields and Movements of Charge

Gravitational Fields It is often useful to relate the Force experienced to a specific location. For instance, a 30 kg person would experience 294 N of.

GRAVITATIONAL POTENTIAL & KINETIC ENERGY

Key Areas covered The relationship between potential difference, work and charge gives the definition of the volt. Calculation of the speed of a charged.

Electrical Energy and Current

Electric Potential Energy

Electric Fields.

V (in Volts) = Potential EPE (in Joules) = Electric Potential Energy

Electric Potential.

Starter (5 mins): An object with 25 x 10-6 C of charge is placed in an electric field (electric field strength = 3000 NC-1). Define ‘electric field’

Presentation transcript:

Electric Field

Charge Symbol: q (or Q) Unit: Coulomb, C

6.25 x 1018 electrons = -1 C ( = -1.6 x 10-19 C) Electrons are negatively charged. In fact, the charge of a single electron is: - 0.00000000000000000016 Coulomb ( = -1.6 x 10-19 C) An object has +1 coulomb of charge if it loses 6,250,000,000,000,000,000 electrons! 6.25 x 1018 electrons = -1 C

Electric Field Definition: “It is a region in which a charged object experiences a force”

Demo – Electric Field

Question: How could you increase the force experienced by the charged object in an electric field?

F = E q The magnitude of the force depends on two things: the charge of the object (q) the electric field strength (E) F = E q E = electric field strength (measured in ___) q = charge (measured in ____)

Example An object with a small charge, 2 x 10-9 C, is left in an electric field. The electric field strength is 7.5 x 104 NC-1. Calculate the size of the force that the object experiences.

Gravity Field vs. Electric Field

Gravity Field = It is a region in which an object with mass experiences a force Electric Field = It is a region in which a charged object experiences a force

F = mg F = Eq In a Gravity Field: In an Electric Field: The force (F) experienced by the object depends on: The mass of the object (m) The strength of the field (g) F = mg In an Electric Field: The charge of the object (q) The strength of the field (E) F = Eq

Work done = Force x Distance How much work is done when a 0.0004 kg object is lifted by 3 m on the Moon? (The moon’s gravity = 1.6 ms-2) How much work is done when an object with a charge of 0.0004 C, is moved against the electric field by 3 m? (Electric field strength = 1.6 NC-1)

Work done = Force x Distance Work done in gravity field: W = F x d = mg x h = mgh (= gravitational potential energy) Work done in electric field: = Eq x d = Eqd (= electric potential energy)

Electric Potential Energy E = electric field strength q = charge d = distance moved inside the field

EXAMPLE A charged object (q = 15 C) was moved in an electric field (0.003 NC-1) by a distance of 0.2 m, against the force. Did the object gain or lose electric potential energy? Calculate the size of the electric potential energy.

Worksheet ONE Q1, 2, 3, 4 Worksheet TWO Q1, 2