Electromagnetism:Electromagnetism:The Electric FieldThe Electric Field

Henry B. Sergio II Henry B. Sergio II

-Electric field is defined as the electric force per -Electric field is defined as the electric force per unit charge. The direction of the field is taken to unit charge. The direction of the field is taken to be the direction of the force it would exert on a be the direction of the force it would exert on a positive test charge. The electric field is radially positive test charge. The electric field is radially outward from a positive charge and radially in outward from a positive charge and radially in toward a negative point charge.toward a negative point charge.

Electric FieldElectric Field

Electric FieldElectric Field

E=F/q

Where;E-Electric chargeF-Force (N)q-Charge (C)

Sample ProblemsSample Problems

1. How much charge experiences a force of 5.0 x 101. How much charge experiences a force of 5.0 x 10 --

33 N due to an electric field of 10 N/C. N due to an electric field of 10 N/C. 2. Two balloons are charged with an identical 2. Two balloons are charged with an identical quantity and type of charge: -6.25 nC. They are quantity and type of charge: -6.25 nC. They are held apart at a separation distance of 61.7 cm. held apart at a separation distance of 61.7 cm. Determine the magnitude of the electrical force of Determine the magnitude of the electrical force of repulsion between them.repulsion between them.3. Two balloons with charges of +3.37 µC and -8.21 3. Two balloons with charges of +3.37 µC and -8.21 µC attract each other with a force of 0.0626 N. µC attract each other with a force of 0.0626 N. Determine the separation distance between the Determine the separation distance between the two balloons.two balloons.

SeatworkSeatwork

Magnetic FieldMagnetic Field-Magnetic fields are produced by electric currents, which can be macroscopic currents in wires, or microscopic currents associated with electrons in atomic orbits.

Magnetic InteractionsMagnetic Interactions

-similar poles repel while opposite pole attracts.

Electric MotorElectric Motor

Electric motors involve rotating coils of wire which are driven by the magnetic force exerted by a magnetic field on an electric current. They transform electrical energy into mechanical energy.

Electric MotorElectric Motor

Electric MotorElectric Motor