GENPHY Reviewer Electrostatic Force PDF

GENPHY REVIEWER  The charge Q which is producing the electric field, is called a source charge ELECTROSTATIC FORCE and the charge q, which tests the effect  The attraction and repulsio...

GENPHY REVIEWER  The charge Q which is producing the electric field, is called a source charge ELECTROSTATIC FORCE and the charge q, which tests the effect  The attraction and repulsion between the charge of source charge, is called a electric charges comes from a force test charge. known as electrostatic force. SOURCE CHARGE  This force can be computed using Coulomb’s law for electrostatics.  is the charge from where the electric field comes from is ALWAYS positive.  A positive test charge is attracted by a negative charge so the direction is towards a negative point charge.  A positive test charge is repelled by a ELECTRIC FIELD AND ITS REPRESENTATION positive charge so the direction is away  An electric field is a region of space from it. where an electric charge experiences a  Positive charges have field lines drawn force. from them.  An electric field is a measurable effect TEST CHARGE generated by any charged object.  An electric field coexists with every  Either positive or negative electrostatic charge.  Its direction is inward  Negative charges have field lines drawn ELECTRIC FIELDS to them.  predict the behavior of the charges ELECTRIC FIELD LINES present in any location in space.  Mathematically, the electric field can be  An electric field can be graphically computed using the equation: represented using electric field lines. The density or thickness of these lines is directly proportional to the strength of the electric field at any region in space.  If the field lines are close to each other,  E - is the electric field, the electric field is stronger.  Q is the source charge  r is the distance from the source charge ELECTRIC POTENTIAL where the electric field is being measured.  is the amount of electric potential  The unit used to measure electric field energy per unit charge. This is is newton per coulomb (N/C). equivalent to the amount of work needed to move a charge from one SOURCE AND TEST CHARGE reference point to another. WORK AND POTENTIAL ENERGY  Energy is defined as the capacity to do work. A body with energy can do work, whereas a body without it cannot do work. POTENTIAL ENERGY  Commonly known as stored energy  is one of the many forms of energy.  It is the energy of a body due to its position and normally converted into useful work.  This is why it is known as the energy at rest. GRAVITATIONAL POTENTIAL ENERGY  a type of potential energy, is due to a body’s elevation from the ground.  A body placed higher above the ground can do greater work as it moves downward from its initial position.