ELECTROSTATICS Coulomb's law is only valid for large charges small charges point charges charges doesn't matter The constant K in Coulomb's law depends on nature of the medium system of units intensity of the charges both a & b The presence of a dielectric always: Increases electrostatic force Reduces electrostatic force It does not affect the electrostatic force It doubles the electrostatic force The relative permittivity value for all dielectrics is always: Less than unity greater than unity equal to unity maybe less or may greater than unity Of the following quantities, the vector quantity is an Electric charge Electrical energy Electric field intensity Electric potential difference Electric field intensity is also known as Electric potential Electric flow Potential gradient both a & b Electric flux is defined as: đ = đ. đ đ = đ. đ đ = đ à đ When the vector surface is held perpendicular to the field lines, then the magnitude of the electric flux is: Negative maximum minimum zero If a charged body moves against an electric field, it gets: Potential energy gravitational energy gradient of energy both a & b One volt is One dyne per coulomb One joule per coulomb One Newton per coulomb One watt per second The electric field created by a positive charge is: Radially outwards Radially inwards circular straight Selenium is conductive when exposed to material monochromatic light light both a & b darkness The force action of a unit positive charge located at a point of an electric field is called: Coulomb force Faraday force Lorentz force Electric field intensity Electric field intensity is also known as Electric potential Electric flow Potential gradient both a & c The potential gradient is defined as âđ¸/âđ - âđ¸/âđ âđ¸/âđ - âđ¸/âđ Rate this page