MOD 3/AME 103 Electrical Fundamentals Practice Quiz 1 PDF

**[MOD 3/AME 103 -- Electrical Fundamentals -- Practice QUIZ 1]** **Student Name:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_** **Student ID No:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_** **[Chapter 1: Electron Theory & Chapter 2: Static Electricity an...

**[MOD 3/AME 103 -- Electrical Fundamentals -- Practice QUIZ 1]** **Student Name:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_** **Student ID No:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_** **[Chapter 1: Electron Theory & Chapter 2: Static Electricity and Conduction]** 1. A good electrical insulating material will contain a. only a small number of free electrons in the outer shell of each atom of the material b. strongly bound free electrons in the atoms of the material c. weakly bound free electrons in the atoms of the material 2. The particles that make up an atom are d. proton, neutron and electron inclusively e. neutron, electron and ion inclusively f. electron and proton only 3. What charge does the nucleus of an atom possess? g. positive h. neutral i. negative 4. What is a molecule? j. The smallest part of an atom k. The smallest particle of a substance that retains its characteristic l. The smallest part of an electron 5. What is the maximum number of electrons in shell N of an atom? m. 18 n. 32 o. 16 6. An atom is p. the smallest part of an element that retains its characteristics. q. the smallest part of a compound that can exist independently. r. neither of the two 7. If electrons are added to an atom it becomes s. a neutral ion t. a positive ion u. a negative ion 8. When an atom loses or gains an electron it is called. v. a molecule w. a current x. an ion 9. A neutron is a particle which y. is contained in the nucleus of all atoms z. orbits the nucleus of the atom a. is contained within the nucleus of most atoms 10. An hydrogen atom consist of b. proton, neutron and an electron. c. proton and an electron only. d. neutron and a proton only. 11. The atomic number of an atom is determined by the number of e. protons f. electrons g. neutrons 12. A good electrical insulator is a material which h. contains a large number of positive ions. i. has 5 to 8 electrons in the outer ring and hence tightly bound to the parent atom j. has more protons than electrons. 13. The valence electron is k. the electron in outer shell of an atom l. the electron in inner shell of atom m. a positive electron 14. Copper is a good \_\_\_\_\_\_\_\_\_\_\_\_ n. Conductor o. Insulator p. Semiconductor 15. Electron orbits are also called as q. waves r. shells s. circles 16. A neutral atom gains electrons t. it gains a positive charge u. it gains a negative charge v. it remains neutral 17. Silicon and Germanium both have the properties of being a w. conductor x. insulator y. semiconductor 18. A semiconductor will have z. two electrons in the outer shell a. four electrons in the outer shell b. eight electrons in the outer shell 19. Phosphorous and Arsenic are c. p-type dopants d. n-type dopants e. neither of the two 20. An example of a good electrical insulator is f. aluminium g. glass h. mercury 21. A neutron has i. the opposite charge to an electron but half the weight of a proton j. the same charge as an electron but half the mass k. no electrical charge but will add weight to the nucleus 22. An element whose atoms have fewer than 4 electrons in their valency shell are l. semiconductors m. good insulators n. good conductors 23. The mass of an atom is contained mainly in the o. proton p. nucleus q. electron 24. Element such as phosphorous with 5 electrons in their outer shell, when combined with pure silicon is a r. isotope s. acceptor t. donor 25. AMU stands for u. absolute mass unit v. atomic measuring unit w. atomic mass unit 26. If the atomic number of an atom is 9, then the number of protons are x. 8 y. 9 z. 12 27. An isotope of an element will have more/less \_\_\_\_\_\_\_\_\_\_\_\_ than usual a. electrons b. neutrons c. protons 28. Which of the following is a p- type dopant d. phosphorous e. gallium f. arsenic 29. The electromagnetic force between two charged bodies is g. inversely proportional to the distance between them h. inversely proportional to the square of the distance between them i. proportional to the distance between them 30. A method of charging an object by rubbing it against another object j. conduction k. induction l. friction 31. When a rubber rod is rubbed with a piece of fur and then separated, which of the following statements best describes what happens? a. Rubbing action dislodges electrons from fur atoms and transfers them to the rubber rod b. the protons are removed from fur c. positive ions are removed from fur 32. What is static electricity? m. Electricity that flows in one direction n. Electricity that constantly changes direction o. An electrical charge on the surface of an object 33. The law of electrostatics consistently demonstrates that opposite charges\_\_\_\_\_\_\_ 34. Which atomic particles move from one surface to another in order to form a static charge? p. electrons q. protons r. neutrons 35. How does a material acquire a positive electrical charge?\ a) by losing electrons.\ b) by gaining protons.\ c) by gaining electrons. 36. What happens when two items with positive charges come close to each other? s. they attract each other t. they will cause an explosion u. they repel each other 37. The movement of an aircraft through air generates unwanted static charges, these charges need to be dissipated to the atmosphere ,this can be done using a. Inductors b. Resistors c. Static discharge wicks 38. The unit for electric charge is \_\_\_\_\_\_\_\_ a. Coulomb b. Joule c. Watt 39. Charged bodies attract or repel each other with a force that is directly proportional to the product of their individual charges and is inversely proportional to the square of the distance between them. This law is referred to as. a. Ohm's law b. Coulomb's law c. Kirchoff's voltage law 40. Tap water is a \_\_\_\_\_\_ conductor of electricity. a. Good b. Poor c. Excellent 41. A Coulomb is v. one ampere second w. one second per ampere x. one ampere per second 42. A material that easily allows the flow of electric charge through it is called a(an) y. insulator z. conductor a. semiconductor 43. A materials place in the triboelectric series is determined by how strongly the material holds on to its electrons b. True c. False 44. Materials with weakly bound electrons tend to loose them, while materials with sparsely filled outer shells tend to gain them, What is this effect called? d. triboelectric effect e. photoelectric effect f. piezoelectric effect 45. The amount of charge that builds up due to the friction between two materials depends on the g. weight of the materials h. surface area in contact i. electrical conductivity of the materials 46. \_\_\_\_\_\_\_\_\_\_\_\_\_ occurs when electric charges build up on objects, such as when materials are pulled apart or rubbed together, causing positive (+) charges to collect on one material and negative (-) charges on the other surface j. static electricity k. magnetism l. dynamic electricity 47. A plastic bag rubbed with cotton wool acquired a positive charge. This happened because m. plastic acquired extra protons from cotton n. plastic acquired extra protons on rubbing o. plastic lost electrons to cotton during rubbing 48. Two objects have collected static electricity with the same charge. What would the two objects do when placed near each other? p. repel q. attract r. stick together 49. What are the electrons present in the atoms outermost shell termed as? s. octet electrons t. duplet electrons u. valence electrons 50. A polythene rod gains a negative charge when it is rubbed with a cloth. Which one of the following statements best explains how this happens? v. Protons transfer to the cloth from the polythene rod w. Electrons transfer from the cloth to the polythene rod x. Electrons transfer to the cloth from the polyethene rod