Number 8 Physics 30 Electricity Questions from Fundamentals of Physics: Combined EditionElectric Forces Intro ProblemWhat is the distance between two protons when they exert force on each other of 4.0 x 10 N?Electric Forces Vectors ProblemTwo small spheres, with charges 1.6 x 10-5 C and 6.4 x 105 C are situated 2.0 m apart. They have thesame sign. Where, relative to these two objects, should a third object be situated, of the opposite signand whose charge is 3.0 x 106 C, so that it experience no net electrical force? Do we really need toknow the charge or sign on the third charge? (0.67 m from the 1.6 x 10-5 C charge)3Electric Forces Proportionalities ProblemTwo small, oppositely charged spheres have a force of electric attraction between them of 1.6 x 10-² N.What does this force become if each sphere is touched with its identical, neutral mate, and then replacedtwice as far apart as before? The mates are taken far away.Electrostatic Forces and Gravity ProblemAssume that a single, isolated electron is fixed at ground level. How far above it, vertically, wouldanother electron have to be, so that its mass would be supported by the force of electrostatic repulsionbetween them?S Electric Fields 1D Vector ProblemWhat is the magnitude and direction of the electric field atpoint Z in the diagram to the right, due to the charged spheresat points X and Y? (2.0 x 10-5 N/C left)+50 µCXElectric Fields 2D Vector ProblemDetermine the magnitude and direction of the electric field at point Z inthe diagram to the right, due to the charges at points X and Y. (1.2 x 105N/C up)0.45 m-10 uCElectric Field in Parallel Plates ProblemTwo charged parallel plates are separated by a distance of 12 cm, as shown.The potential difference between the plates is 750 V. A small positive testcharge is placed between the plates at three different positions, a, b and c.Determine the magnitude and direction of the electric field experienced bythe test charge in each position. (a, b and c are equal)YZ+2.0 x 108 C3.03.0 cm0.30 m+2.0 x 108 CⒸa3.0 cmnegative (-)10 cmb+Cpositive (+)Linked Proportionalities Problem → Parallel Plates and Electric FieldsIn the parallel plate apparatus in the last problem, what would the electric field intensity become if hof the charge were removed from each plate and the separation of the plates was changed from 12 m-8.0 mm? (no change)

Given:- d= 12 cm = 0.12 m ∆V= 750 V

Electric Field in Parallel Plates Problem Two charged parallel plates are separated by a distance of 12 cm, as shown. The potential difference between the plates is 750 V. A small positive test harge is placed between the plates at three different positions, a, b and c. Determine the magnitude and direction of the electric field experienced by he test charge in each position. (a, b and c are equal) 12 cm negative (-) a 10 cm positive (+)