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11. Which statement is TRUE about electrostatic force between subatomic particles? a. The force between two protons is equal to that of a proton and neutron. b. The force between two electrons is equal in magnitude between that of an electron and neutron. c. The force between two protons is equal in magnitude between that of a proton and neutron. d. The force between two protons is equal in magnitude and same direction as that of a proton and electron. 12. The force between two charges, Q1=+2C and Q2= +3C is F. What is the magnitude of F if Q2 is replaced by -3C charge? a. equal to F b. less than F c. greater than F d. cannot be determined 13. What happens to the force between two protons if their separation distance is doubled? a. halved b. doubled c. quartered d. quadrupled 14. The force between two charges is 20N. If the magnitude of charges is reduced to half, what is the magnitude of the force between them? a. 5N b. 10 N C. 40 N d. 80 N33. 34. 35. 36. 37. 38. 39. 40. What mathematical relationship can you draw from the force and distance of charged spheres in a Coulomb's Law? a. complex b. direct proportional c. inverse proportional d. joint The amount of charge transferred through a point on a conductor in 1 second by a current of 1 Ampere is a. Ampere b. Coulomb c. Ohm d. Volt The region that surrounds a charged object or particle is a. electric field b. field lines c. electric flux d. flux space Which of the following is NOT TRUE for both gravitational and electric forces? a. The inverse square distance law applies. c. The force depends on physical properties of objects. b. The force is either repulsive or attractive. d. Potential energy is a function of the r between objects. The quantity that measures the electric charge per unit volume of space is . a. Electric potential b. charge density c. Gaussian surface d. electric flux What is the electric field strength at a point 30 cm from a charge q=l-x10'9 C? a. 200 N/C b. 350 N/C c. 400 N/C d. 420 N/C The total electric flux from a cubical box 28.0 cm on a side is 1.41r5x103 N-m2/C. What charge is enclosed by the box? a. 1.25x10'3 C b. 1.40x10'3 C c. 1.28x10'3 C d. 1.30x10'3 C The electric field between two square metal plates is 130 N/C. The plates are 1.0 m on a side and are separated by 3.0 cm. What is the charge on each plate assuming that they are equal and opposite? a. 1.10x10'9 C b. 1.15x10'9 C c. 1.20x10'9 C d. 1.25x10'9 C 24. 25. 26. 27. 28. 29. 30. What can you say about the waves that travel along a string and those in air? a. All are transverse waves. c. Waves in a string are longitudinal while those in air are transverse. b. All are longitudinal waves. d. Waves in a string are transverse while those in air are longitudinal. The law that involves the total flux through a closed surface is . a. Coulomb's Law b. Gauss's Law c. Kirchhoff's Law d. Ohm's Law When is a Gauss's law useful? q=charge a. When q's distribution is simple and asymmetrical. c. When q's distribution is simple and symmetrical. b. When q's distribution is complex and asymmetrical. d. When q's distribution is complex and symmetrical. Electric field is always to the surface outside of a conductor. a. parallel b. opposite c. perpendicular d. Cannot be determined. Suppose you repeatedly dip your finger into a basin of water to make circular waves. What happens to the wavelength of the wave as the frequency increases? a. decreases b. increases c. halved d. at a constant These indicate the direction ofthe force due to the given field on a test charge. a. electric field lines b. field region c. electric flux d. flux region What will happen to the field lines if experiencing two equal charges of opposite signs? a. Electric field lines flow in straight lines in two q's. b. Electric field lines may form a parabola flowing alternate ways in two q's. c. Electric field lines are curved and directed from +q to -q. d. Electric field lines are curved and directed from -q to +