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UCF PHY 2054C - Electric Field

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Electric Field (Continued)HappninsThe Coulomb forceSlide 4Slide 5An electric field of 10 N/C exists at a point in space. A 5.0 Coulomb charge is placed at the point. The force on the charge isSlide 7Which one of the following statements is true concerning the magnitude of the electric field at a point in space?At which point (or points) is the electric field zero N/C for the two point charges shown on the x axis?Slide 10Let’s Do The QUIZ!E-Field w3d3TodayQuiz 2Continue with E-FieldA problem or twoMonday7:30 am PROBLEM SESSIONElectric Flux and Gauss’s LawWednesdayStart Unit on PotentialSundayWebAssign DueFridayQuiz, Etc.Coulombs Law applies:The FORCE is always on a particular chargeThe Force on a particular charge under the influence of other charges is found by SUPERPOSITION. (Add em up!!) The force is a VECTOR!!! You add them as vectors! A charge cannot apply a force to itself.1 22q qF Kr=unitu nitrrFE220001rqkrqqkqqIf a charge Q is in an electric field E then it will experience a force F.The Electric Field is defined as the force per unit charge at the point.Electric fields are caused by charges and consequently we can use Coulombs law to calculate it.For multiple charges, add the fields as VECTORS.An electric field of 10 N/C exists at a point in space. A 5.0 Coulomb charge is placed at the point. The force on the charge isA. It can’t be calculated without additional information.B. 5.0 NC. 10.0 ND. 50.0 NE. 2.6 TharksA) It is a measure of the total charge on the object.B) It is a measure of the electric force on any charged object.C) It is a measure of the ratio of the charge on an object to its mass.D) It is a measure of the electric force per unit mass on a test charge.E) It is a measure of the electric force per unit charge on a test charge.?A) The electric field is never zero in the vicinity of these charges.B) The electric field is zero somewhere on the x axis to the left of the +4q charge.C) The electric field is zero somewhere on the x axis to the right of the –2q charge.D) The electric field is zero somewhere on the x axis between the two charges, but this point is nearer to the –2q charge.E) The electric field is zero at two points along the x axis; one such point is to the right of the –2q charge and the other is to the left of the +4q charge.Let’s Do The QUIZ!THEN BACK TO UNIT 3 – THE ELECTRIC FIELD. TRY TO FINISH IT


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UCF PHY 2054C - Electric Field

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