LALYN'S JOANNA REPORTING IN PHYSICS.pptx
- 1. ELECTRIC FIELDS AND FORCES BY LALYN LOTA JOANNA CASIMERO
- 2. ELECTRIC FIELDS • An electric field is a conceptual framework used in physics to describe the influence exerted by electrically charged particles in a given region of space. • It represents the ability of charged objects to exert a force on one another, even in the absence of physical contact.
- 4. POSITIVE CHARGE: ELECTRIC FIELD LINES POINT OUTWARD. NEGATIVE CHARGE: ELECTRIC FIELD LINES POINT INWARD.
- 5. ELECTRIC FIELDS LINE • Electric fields are visualized by drawing electric field lines. • An electric field line always points in the direction a positive charge would accelerate if it were placed into the field. • Positive charges are always attracted to negative charges. For this reason, electric field lines always point from positive to negative.
- 7. ELECTRIC FIELDS LINE The lines closer to the charge represent a strong electric field and the lines away from charge correspond to the weak electric field. This is because the strength of the electric field decreases as we move away from the charge
- 8. FORCES INTERACTION • In physics, a force is an interaction between two objects that has the ability to change the motion of one or both of the objects. • One of the fundamental forces of the universe is the electric force. This is the force that exists between all charged particles.
- 9. • THE ELECTRIC FORCE IS RESPONSIBLE FOR SUCH DIVERSE PHENOMENA AS MAKING YOUR HAIR STAND UP ON A COLD DRY DAY, CREATING CHEMICAL BONDS, AND ALLOWING YOU TO SEE WHEN YOU TURN ON A LAMP ON A DARK NIGHT.
- 10. CHARGES INTERACTION ARE FORCES • The interaction between two particles is the result of electrical charges and thus it is called an electrical force. • Unlike many forces that we study, the electrical force is a non-contact force- it exists despite the fact that the interacting objects are not in physical contact with each other.
- 12. COULOMB’S LAW Coulomb’s law is essential in understanding and quantifying the interactions between charged particles. It allows us to calculate the forces between charges and predict their behavior in various electrostatic situations. This law is fundamental to the study of electricity and magnetism, forming the basis for many applications and phenomena in electromagnetism.
- 13. COULOMB’S LAW EQUATION •The Coulomb’s law equation provides an accurate description of the force between two objects whenever the objects act as point charges. •Electric charge is a fundamental property of matter. It is fundamentally associated with atomic particles, the electron and proton. Electron carry a negative charge and protons carry a positive charge. Different combinations of two kinds of charges can produce either attractive or repulsive force.
- 14. Coulomb’s law state that “the electrical force between two charged objects is directly proportional to the product of the quantity of charge on the objects and inversely proportional to the square of the separation distance between the two objects.
- 15. COULOMB’S LAW CAN BE EXPRESSED AS: F = k * (q1 * q2) / r^2 where: - F is the electrostatic force between the charges, - k is the electrostatic constant (also known as Coulomb’s law constant), which has a value of approximately 9 x 10^9 N m^2/C^2, - q1 and q2 are the magnitudes of the charges, and - r is the distance between the charges.
- 16. CALCULATION USING COULOMB’S LAW • Suppose that two-point charges, each with a charge of +1.00 Coulomb’s are separated by a distance of 1.00 meter. Determine the magnitude of the electrical force of repulsion between them.
- 17. •This electric force is extremely basic since most charges are due to point-like particles. It is responsible for all electrostatic effects and underlies most macroscopic forces. It is also extraordinary strong compared with the gravitational force is only an attractive force and the electric force may be attractive or repulsive.
- 19. PRINCIPLE OF SUPERPOSITION Principle of superposition gives the method to find force on a charge when system consists of large number of charges. According to this principle when a number of charges are interacting the total force on a given charge is vector sum of forces exerted on it by all other charges.
- 21. 1. Consider a system of three point charges: q1 = +4 μC (microcoulombs), q2 = -2 μC, and q3 = +6 μC. The charges are located at points A, B, and C, respectively. We want to calculate the electric field at point P, which is located a distance of 2 meters from charge q1, 3 meters from charge q2, and 4 meters from charge q3.
- 22. 2. Suppose we have two point charges, q1 = +3 μC (microcoulombs) and q2 = - 5 μC, placed a distance of 10 cm apart. We want to calculate the electrostatic force between them using Coulomb’s law.