Chem Terminologies Essay

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>PHYSICAL TERMINOLOGY SEM II< Chapter 1: Electrostatics | DEFINITION | 1. Coulomb’s law | The magnitude of the electrostatic (Coulomb/electric) force between two point charges is proportional to the product of the charges and inversely proportional to the square of the distance between them. | 2. Electric field | A region of space around isolated charge where an electric force is experienced if a positive test charge is placed in the region. | 3. Electric field strength | Electrostatic force per unit positive test charge that acts at the point in the same direction as the force. | 4. Electric potential | The work done in bringing positive test charge from infinity to that point in the electric field. | 5. Equipotential surface | A surface where all points on the surface that have the same electric potential. | | FORMULA | 1. Electrostatic force | Q = magnitude of point charge.q = magnitude of test charge.r = distance between Q-q. | 2. Electric field strength | r = distance between Q to specified point. | 3. Electric potential | r = distance between Q to specified point. | 4. Electric potential energy | r = distance between Q-q. | 5. Relationship F-E | | 6. Relationship E-V | | 7. Relationship U-V | | 8. Potential difference between point a and b | Va = electric potential at point a.Vb = electric potential at point b. | Chapter 2: Capacitor & Dielectric | DEFINITION | 1. Capacitance | Capacitance measures the magnitude of charge which has accumulated on each capacitor’s plate per unit voltage across it. | 3. Time constant | Time constant refers to the time taken for the charge to reach 63% of the maximum value when charging, or 37% of the maximum value when discharging. | 3. Dielectric | The non-conducting (insulating) material placed between the plates of a capacitor. | 4. Dielectric constant | The

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