Test I. True or False: Write TRUE if the statement is correct and FALSE if the statement is incorrect. Write your answer on the space provided before the number. 1. The electric field just outside a charged conductor is normal to the conductor's surface. 2. The total amount of charged particles can change within a closed system. 3. Electric charge is quantized. 4. The electric field at any point inside a conductor is zero. 5. The closer two charges are, the greater the force on them. 6 . Electric forces can only act between charged objects - either like-charged or oppositely- charged. 7. A charged body has only one type of charge. 8. Electric fields don't exist unless there is something to detect them. 9. Only conductors are affected by electrostatic forces. 10. Electric charge is the result of the transfer of both protons and electrons. Test Il. Identification: Identify the correct answer in the box to make the statement true. Write your answer on the space provided before the number. Electric field Dipole moment Vector Torque Electric potential Radial Coulomb Equipotential Potential difference Kinetic energy Negatively charged Positively charged Conductor Insulator Work 11. A rotational or twisting effect of a force. 12. A directed quantity, one with both magnitude and direction of between two points. 3. The vector product of the charge on either pole of a dipole and the distance separating them . _14. A region of space around a charged particle or between two voltages and it exerts a force on charged objects in its vicinity. 15. The potential energy per unit charge at a point in a static electric field voltage. 16. The amount of electric charge carried by a current of 1 ampere flowing for 1 second. 17. A region whose every point has the same potential. 18. Moving along a radius. 19. The potential energy per unit charge at a point in a static electric field voltage. 20. A region of space around a charged particle or between two voltages and it exerts a force on charged objects in its vicinity. 21. An object with more electrons than protons. 22. An object with more protons than electrons. 23. A material through which charge moves easily. 24. A material through which charge does not move easily. 25. A measure of energy expended in moving an object and most commonly force times displacement.26. Which of the following is the correct force between two negative charges? A. B. D. 27. Which of the following is the correct force between one positive charge and one negative charge? A. C . B. D. 28. Where is the magnetic force strongest in a magnet? A. Near the center of the magnet B. At the poles of the magnet C. In the middle of the magnetic field D. The magnetic force is the same everywhere 29. When there is an equal amount of positive and negative charges on an object, the object is A. positively charged B. neutral C. negatively charged D. cannot be determine 30. The north pole of one magnet will be A. attracted to the north pole of another magnet B. attracted to the south pole of another magnet C. stick to the north pole of another magnet D. repelled by the south pole of another magnet 31. There is a repulsive force between two charged objects when _ A. charges are unlike sign C. they have the same number of protons B. charges are like sign D. they have the same number of electrons 32. Which of the following is an example of static electricity? A. An electric socket in your home C. Your pants sticking on your legs B. Electricity for a light bulb D. All of the above 33. What happens when two items with positively charges come close to each other? A. They attract each other C. They will cause an explosion B. They will join together D. They repel each other 34. What are the two atomic particles that make up the nucleus of the atom? A. Electrons and protons C. Neutrons and electrons B. Neutrons and protons D. Neutrons only 35. What atomic particles move from one surface to another in order to form a static charge? A. Electrons B. Protons C. Electrons D. All of the above 36. Charges that are the same each other. A. attract B. repel C. explode D. None of the above 37. Charges that are different each other. A. attract B. repel C. explode D. None of the above 38. Which of the following can be used to charge a metal rod that is held in your hand? Rub it with_. A . fur B. silk C. wool D. it can't be done 39. Which of the following objects that are attracted by a positively charged object? A. only positively charged objects C. only neutral objects B. only negatively charged objects D. neutral and negatively charged objects 40. In which of the following forms is the energy stored in a capacitor? A. Charge B. Potential C. Capacitance D. Electric Field41. What happens when one material is rubbed against another? A. The material becomes electrically neutral C. The material becomes negatively charged B. The material becomes electrically charged D. The material becomes positively charged 42. A bird sitting on a high power line A. gets killed instantly C. gets a fatal shock B. gets a mild shock D. is not affected practically 43. What is the SI unit for electric potential energy? A. Erg B. Joule C. Coulomb D. Newton per Coulomb 44. A capacitor is connected across a battery and the plate separation of capacitor is increased without removing the battery, then _ A. capacitance will increase C. energy stored will decrease B. charge stored will increase D. potential difference will increase 45. Electric potential is _ A. potential energy of the field C. potential energy per unit volume B. potential energy of all charges D. potential energy per unit charge 46. Which among the following qualities is NOT affected by the magnetic field? A. Moving charge C. Change in magnetic flux B. Stationary charge D. Current flowing in a conductor 47. If the flow of electric current is parallel to the magnetic field, the force will be _ A. zero B. infinity C. maximum D. half the original value 48. What areas of a magnet have the strongest magnetic effect? A. The sides B. The middle C. The poles D. The magnetic field lines 49. What substance is attracted to a magnet? A. Iron B. Lead C. Silver D. Water 50. A bar magnet is divided in two pieces. Which of the following statements is true? A. The bar magnet is demagnetized. B. The magnetic poles are separated. C. Two new bar magnets are created. D. The magnetic field of each separated piece becomes stronger