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ELECTRICITY: UNIT EXAM NAME: PART 1: MULTIPLE CHOICE (70) 1. THIS PART OF THE ATOM HAS A POSITIVE CHARGE: A) PROTON B) NEUTRON C) ELECTRON D) NUCLEUS 2. BOTH PROTONS AND ELECTRONS HAVE THIS BASIC PROPERTY: A) FOUND IN THE NUCLEUS B) ARE SIMILAR IN MASS C) HAVE A CHARGE D) CAN BE LOST IN FRICTION 3. WHAT DO CHARGES EXERT? A) FORCES C) PRESSURE B) ELECTRICITY D) POWER 4. OPPOSITELY CHARGED PARTICLES EXERT THIS KIND OF FORCE BETWEEN EACH OTHER: A) STATIC B) REPULSION C) ATTRACTION D) MAGNETIC 5. PARTICLES THAT HAVE THE SAME CHARGE EXERT THIS KIND OF FORCE BETWEEN EACH OTHER: A) STATIC B) REPULSION C) ATTRACTION D) MAGNETIC 6. AN ELECTRIC CHARGE EXERTS A FORCE OVER AN AREA CALLED: A) DOMAIN B) MAGNETIC FIELD C) ELECTROMAGNETIC DOMAIN D) ELECTRIC FIELD 7. RUBBING A BALLOON WITH A PIECE OF CLOTH IS AN EXAMPLE OF CHARGING AN OBJECT BY: A) FRICTION B) INDUCTION C) CONDUCTION D) REDUCTION 8. REARRANGEMENT OF ELECTRIC CHARGES IS THE RESULT OF CHARGING BY: A) CONDUCTION B) INDUCTION C) INSULATION D) FRICTION 9. FOR INDUCTION TO OCCUR: A) FRICTION IS NECESSARY C) CONDUCTION IS NECESSARY B) NO CONTACT IS NECESSARY D) CONTACT IS NECESSARY 10. WHICH OF THESE IS NOT A METHOD OF CHARGING A PARTICLE? A) FRICTION B) CONDUCTION C) INDUCTION D) INSULATION 11. ELECTRIC DISCHARGE IS A: A) GAIN OF BOTH POSITIVE + NEGATIVE C) LOSS OF STATIC ELECTRICITY B) GAIN IN STATIC ELECTRICITY D) LOSS OF POSITIVE CHARGES 12. STATIC ELECTRICITY IS DEFINED AS: A) FRICTION BETWEEN 2 OBJECTS C) STATIONARY ELECTRICITY B) THE BUILDUP OF CHARGES D) ELECTRICITY IN A CIRCUIT 13. WHEN STATIC ELECTRICITY IS LOST BY ELECTRIC CHARGES MOVING OFF AN OBJECT, THERE MAY BE A PRODUCTION OF: A) LIGHT B) SOUND AND HEAT C) LIGHT AND SOUND D) LIGHT, SOUND, AND HEAT 14. A FORCE OF ATTRACTION EXISTS BETWEEN: A) TWO PROTONS B) A PROTON + AN ELECTRON C) TWO ELECTRONS D) TWO NEUTRONS 15. LIKE CHARGES: A) REPEL EACH OTHER C) ATTRACT EACH OTHER B) DON’T AFFECT EACH OTHER D) FIRST ATTRACT, THEN REPEL 16. WHEN THE METAL LEAVES OF AN ELECTROSCOPE HANG STRAIGHT DOWN: A) THE ELECTROSCOPE IS UNCHARGED B) THE LEAVES ARE REPELLING EACH OTHER C) AN ELECTRIC CHARGE IS PRESENT D) CURRENT IS PASSING THROUGH THE LEAVES 17. THE CONDUCTING FLUID IN A WET CELL IS CALLED A/AN: A) PASTE B) ELECTROLYTE C) ELECTRODE D) BATTERY 18. A BATTERY IS A DEVICE THAT: A) PRODUCES ELECTRICITY BY CONVERTING CHEMICAL ENERGY INTO ELECTRICAL ENERGY B) PRODUCES ELECTRICITY BY CONVERTING ELECTRICAL ENERGY INTO CHEMICAL ENERGY C) PRODUCES ELECTRICITY BY HAVING PROTONS FLOW FROM THE POSITIVE POST TO THE NEGATIVE POST D) PRODUCES ELECTRICITY BY EXTRACTING ELECTRONS FROM THE ELECTROLYTE LIQUID 19. WHEN A WIRE IS CONNECTED TO THE TERMINALS OF A SOURCE, A COMPLETE PATH CALLED A/AN __________ IS FORMED? A) CURRENT B) SYNAPSE C) ELECTRIC OUTLINE D) CIRCUIT 20. ELECTRIC CURRENT AND ELECTRIC CHARGES ARE RELATED IN THE FACT THAT: A) THE HIGHER THE ELECTRIC CURRENT IN A WIRE, THE FASTER THE ELECTRIC CHARGES ARE PASSING THROUGH B) THE HIGHER THE ELECTRIC CURRENT IN A WIRE, THE SLOWER THE ELECTRIC CHARGES ARE PASSING THROUGH C) THE SLOWER THE ELECTRIC CURRENT IN A WIRE, THE FASTER THE ELECTRIC CHARGES ARE PASSING THROUGH D) THEY BOTH HAVE TO DO WITH THE TRANSFER OF PROTONS 21. VOLTAGE DESCRIBES: A) HOW MUCH CURRENT IS PRESENT C) THE SPEED OF THE CURRENT B) THE FLOW OF THE CURRENT D) POTENTIAL DIFFERENCE 22. THE AMOUNT OF CURRENT THAT FLOWS THROUGH A WIRE DEPENDS ON VOLTAGE AND _____________? A) CONDUCTORS B) RESISTANCE C) CURRENT D) POTENTIAL DIFFERENCE 23. ACCORDING TO OHM’S LAW, I (CURRENT OF A WIRE) =? A) VOLTAGE B) RESISTANCE C) VOLTAGE / RESISTANCE D) RESISTANCE / VOLTAGE 24. THE OHM IS THE UNIT OF MEASUREMENT FOR ELECTRIC: A) RESISTANCE B) VOLTAGE C) CURRENT D) FIELDS 25. MATERIALS THAT HAVE ALMOST NO RESISTANCE ARE CALLED: A) MAGNETS B) CONDUCTORS C) ANTIRESISTORS D) SUPERCONDUCTORS 26. DIRECT CURRENT IS WHEN: A) ELECTRONS MOVE FROM ONE OBJECT DIRECTLY TO ANOTHER B) ELECTRONS MOVE IN THE SAME DIRECTION C) ELECTRONS MOVE BACK AND FORTH D) ELECTRONS MOVE DIRECTLY TO AND FROM AN OBJECT 27. ALTERNATING CURRENT IS WHEN: A) ELECTRONS MOVE FROM ONE OBJECT DIRECTLY TO ANOTHER B) ELECTRONS MOVE IN THE SAME DIRECTION C) ELECTRONS MOVE BACK AND FORTH D) ELECTRONS MOVE DIRECTLY TO AND FROM AN OBJECT 28. WHAT MUSIC GROUP GOT THEIR NAME FROM THE FLOW OF ELECTRIC CURRENTS? A) ELECTRIC CIRCUS B) POWER FLOW C) TERMINAL ELECTRICS D) AC / DC 29. AN ELECTRIC CIRCUIT CONSISTS OF A SOURCE OF ENERGY, RESISTANCE, WIRES, AND A_____________? A) BATTERY B) THERMOCOUPLE C) SWITCH D) GENERATOR 30. WHICH OF THESE ARE THE 2 TYPES OF ELECTRIC CIRCUITS? A) SERIES + OPEN B) OPEN + CLOSED C) PARALLEL + OPEN D) SERIES + PARALLEL 31. WHAT PROTECTS A CIRCUIT FROM BEING OVERLOADED? A) FUSES B) CIRCUIT BREAKERS C) BOTH A + B D) NONE OF THESE 32. THE REGION IN WHICH MAGNETIC FORCES ACT IS CALLED A: A) LINE OF FORCE B) POLE C) MAGNETIC FIELD D) FIELD OF ATTRACTION 33. THE REGION IN A MAGNET WHERE THE MAGNETIC FIELDS OF ATOMS ARE ALIGNED IS A ___________. A) FERRUM B) DOMAIN C) COMPASS D) MAGNETOSPHERE 34. THE IDEA OF THE EARTH AS A MAGNET WAS FIRST THOUGHT OF BY WHICH SCIENTIST? A) DALTON B) FARADAY C) OERSTED D) GILBERT 35. THE RESULTS OF THE SUN’S MAGNETIC FIELD CAN BE SEEN AS THESE THINGS: A) SUNSPOTS B) SOLAR WINDS C) MAGNETIC STRIPES D) RIDGES 36. WHAT IS THE AREA OF THE EARTH’S MAGNETIC FIELD IS CALLED? A) ATMOSPHERE B) STRATOSPHERE C) AURORA D) MAGNETOSPHERE 37. CHARGED PARTICLES FROM THE SUN THAT GET CLOSE TO THE EARTH’S SURFACE PRODUCES: A) SUPERNOVAS B) VOLCANOES C) SUN BURN D) AURORAS 38. THE FORCE OF ATTRACTION OR REPULSION OF A MAGNETIC MATERIAL DUE TO THE ARRANGEMENT OF ITS ATOMS IS CALLED: A) ELECTROMAGNETIC FORCE B) MAGNETIC DOMAINS C) MAGNETIC PROPERTIES D) MAGNETISM 39. THE MAGNETIC FORCE THAT THE EARTH EXERTS IS STRONGEST AT THE: A) NORTH POLE B) SOUTH POLE C) GEOGRAPHIC POLES D) MAGNETIC POLES 40. IN TERMS OF A COMPASS, WHERE IS THE MAGNETIC SOUTH POLE LOCATED? A) RUSSIA B) CANADA C) ANTARCTICA D) AUSTRALIA 41. IF YOU WERE TO MAGNETIZE A MATERIAL, YOU WOULD BE DOING WHAT? A) INCREASING ITS MAGNETIC POWER B) ALIGNING ITS MAGNETIC DOMAINS C) TRANSFERRING ELECTRONS TO IT D) TAKING ELECTRONS FROM IT 42. IF YOU CUT A MAGNET IN HALF, WHAT WILL BE THE RESULT? A) A MAGNET WITH ONLY 1 POLE B) A MAGNET WITH 2 LIKE POLES C) A MAGNET WITH NO POLES D) A MAGNET WITH 2 UNLIKE POLES 43. IF THE DIFFERENT PARTS OF AN ELECTRIC CIRCUIT ARE FOUND ON SEPARATE BRANCHES OF THE CIRCUIT, THE CIRCUIT IS CALLED A / AN: A) OPEN CIRCUIT B) PARALLEL CIRCUIT C) TRANSISTOR CIRCUIT D) SERIES CIRCUIT 44. THE STRENGTH OF THE MAGNETIC FIELD OF AN ELECTROMAGNET CAN BE INCREASED BY: A) INCREASING THE NUMBER OF COILS IN THE WIRE ONLY B) INCREASING THE AMOUNT OF CURRENT IN THE WIRE ONLY C) INCREASING THE AMOUNT OF IRON IN THE CENTER ONLY D) ALL THE ABOVE 45. A GENERATOR CAN BE CONSIDERED THE OPPOSITE OF A / AN: A) GALVANOMETER B) TRANSFORMER C) ELECTRIC MOTOR D) ELECTROMAGNET 46. A DEVICE THAT CHANGES THE VOLTAGE OF ALTERNATING CURRENT IS A / AN: A) TRANSFORMER B) ELECTRIC MOTOR C) GENERATOR D) GALVANOMETER 47. THE SCIENTIST WHO DISCOVERED THAT AN ELECTRIC CURRENT CREATES A MAGNETIC FIELD IS: A) FARADAY B) OERSTED C) HENRY D) MAXWELL 48. A DEVICE WITH AN ELECTROMAGNET THAT CONTINUALLY ROTATES BECAUSE OF A CHANGING ELECTRIC CURRENT IS A / AN: A) DOORBELL B) SOLENOID C) GALVANOMETER D) ELECTRIC MOTOR 49. THE CREATION OF AN ELECTRIC CURRENT BY A CHANGING MAGNETIC FIELD IS KNOWN AS: A) ELECTROMAGNETIC INDUCTION B) GENERATION C) TRANSFORMATION D) STEPPING-UP 50. THE RELATIONSHIP BETWEEN ELECTRICITY AND MAGNETISM IS CALLED: A) ELECTRISM B) MAGNETICITY C) ELECTROMAGNETISM D) ELECTROMAGNETICITY 51. A ______________ IS USED TO DETECT SMALL CURRENTS. A) GALVANOMETER B) GENERATOR C) TRANSFORMER D) SOLENOID 52. A CHANGING MAGNETIC FIELD PRODUCES THIS TYPE OF CURRENT: A) CONDUCED B) INDUCED C) DIRECT D) INDIRECT 53. AN ELECTRIC CURRENT WILL BE INDUCED IN A CIRCUIT EXPOSED TO A _______________ MAGNETIC FIELD. A) POSITIVE B) NEGATIVE C) CONSTANT D) CHANGING 54. _______________ IS USED IN THE HOOVER DAM TO CREATE POWER. A) GENERATORS B) TRANSFORMERS C) GALVANOMETERS D) ELECTROMAGNETS 55. PEDDLING A BIKE AND USING THAT POWER TO LIGHT A BULB IS AN EXAMPLE OF A / AN: A) TRANSFORMER B) SOLENOID C) GENERATOR D) MOTOR 56. THE STUDY OF THE RELEASE, BEHAVIOR, AND CONTROL OF ELECTRONS AS IT RELATES TO USE IN HELPFUL DEVICES IS CALLED: A) COMPUTERS B) ELECTROTECHNOLOGY C) ELECTRONICS D) TRANSISTOLOGY 57. WHO INVENTED THE FIRST VACUUM TUBE? A) EDISON B) HENRY C) FARADAY D) BYBLOW 58. THE FLOWING OF ELECTRONS FROM AN EMITTER TO A COLLECTOR OCCURS IN WHAT DEVICE? A) AMPLIFIER B) VACUUM TUBE C) SEMICONDUCTOR D) TRANSISTOR 59. WHICH ONE OF THESE IS NOT A KIND OF VACUUM TUBE? A) RECTIFIER B) DIODE C) TRIODE D) AMPLIFIER 60. THE DISCOVERY OF ____________ MADE THE USE OF SOLID-STATE DEVICES POSSIBLE: A) VACUUM TUBES B) AMPLIFIERS C) SEMICONDUCTORS D) DIODES 61. GERMANIUM AND ______________ ARE MOST COMMONLY USED IN SEMICONDUCTORS: A) GOLD B) SILICON C) ALUMINUM D) CARBON 62. HOW MANY TYPES OF SEMICONDUCTORS ARE THERE? A) 1 B) 2 C) 3 D) 4 63. A SANDWICH OF THREE LAYERS OF SEMICONDUCTORS IS CALLED: A) RECTIFIER B) TRANSISTOR C) AMPLIFIER D) SEMICONDUCTOR 64. WHICH ONE OF THESE IS A TRANSISTOR NOT USED IN? A) CAR B) RADIO C) TELEVISION D) COMPUTER 65. A THIN PIECE OF SILICON THAT IS USED IN COMPUTERS IS CALLED A: A) BIT B) BYTE C) INTEGRATED CIRCUIT D) CHIP 66. A SOUND WAVE CONSISTING OF AN ELECTRIC FIELD AND A MAGNETIC FIELD IS CALLED A / AN ________________ WAVE. A) ELECTROMAGNETIC B) X-RAY C) PHOTON D) MAGNETOGRAPH 67. THIS SCIENTIST INVENTED THE TELEPHONE: A) EDISON B) BELL C) MAXWELL D) FARADAY 68. RADIOS WORK BY CONVERTING SOUND VIBRATIONS INTO: A) SOUND WAVES B) PHONTON WAVES C) X-RAY WAVES D) ELECTROMAGNETIC WAVES 69. IN A TELEPHONE, THE ENDS ARE COMPOSED OF A TRANSMITTER AND ______________? A) ELECTROMAGNET B) PERMANENT MAGNET C) RECIEVER D) VIBRATING METAL DISK 70. COMPUTER HARDWARE REFERS TO THE PHYSICAL PARTS OF A COMPUTER, WHILE THE SOFTWARE REFERS TO THE ______________? A) MAIN STORAGE B) OUTPUT DEVICE C) INPUT DEVICE D) SET OF PROGRAMS PART 2: MATCHING (30) 1. HAS A POSITIVE CHARGE 2. HAS A NEGATIVE CHARGE 3. AN AREA THAT AN ELECTRIC CHARGE EXERTS ITSELF. 4. THE DIFFERENCE IN CHARGE IN A BATTERY 5. PRODUCES ELECTRICAL ENERGY FROM HEAT ENERGY 6. THE MOST DIRECT CONVERSION OF LIGHT TO ENERGY OCCURS IN THIS DEVICE 7. THE FLOW OF A CHARGE 8. THE OPPOSITION TO THE FLOW OF ELECTRIC CHARGES 9. PROVIDES A COMPLETE, CLOSED PATH FOR AN ELECTRIC CURRENT 10. A TYPE OF CIRCUIT THAT NO ELECTRICITY CAN FLOW THROUGH 11. A TYPE OF CIRCUIT THAT ELECTRICITY CAN FLOW THROUGH 12. TYPE OF CIRCUIT USED IN HOUSES 13. A MEASURE OF THE RATE AT WHICH ELECTRICITY DOES WORK OR PROVIDES ENERGY 14. A REGION WHERE THE MAGNETIC FIELDS OF INDIVIDUAL ATOMS ARE GROUPED TOGETHER 15. THE AREA WHERE THE MAGNETIC FIELD OF THE EARTH IS FOUND 16. THIS TYPE OF MATERIAL IS HIGHLY MAGNETIC 17. THIS ELEMENT IS THE ROOT WORD FOR FERROMAGNETIC 18. WHEN YOU UNMAGNETIZE A MAGNET BY DROPPING IT, WHAT DO YOU SCRAMBLE 19. A SOLENOID WITH A PIECE OF IRON IN THE CENTER OF IT 20. A LONG COIL OF WIRE WITH MANY LOOPS 21. A DEVICE THAT CHANGES ELECTRICAL ENERGY INTO MECHANICAL ENERGY 22. AN INSTRUMENT THAT DETECTS SMALL ELECTRICAL CURRENTS 23. PRODUCTION OF A CURRENT BY CHANGING THE MAGNETIC FIELD 24. A DEVICE THAT CHANGES MECHANICAL ENERGY INTO ELECTRICAL ENERGY 25. THE BRANCH OF SCIENCE THAT HAS DEVELOPED ELECTRIC DEVICES 26. A VACUUM TUBE THAT CONVERTS AC TO DC _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ 27. A DEVICE THAT INCREASES THE STRENGTH OF AN ELECTRIC SIGNAL 28. THE PROCESS OF ADDING IMPURITIES TO SEMICONDUCTORS 29. A WAVE CONTAINING BOTH AN ELECTRIC FIELD AND A MAGNETIC FIELD 30. A DEVICE THAT USES ELECTRONS TO PRODUCE IMAGES ON A SCREEN _________________ _________________ _________________ _________________ WORD BANK CATHOD-RAY TUBE PROTON AMPLIFIER POTENTIAL DIFFERENCE RECTIFIER ELECTRIC FIELD ELECTROMAGNETIC WAVE ELECTRONICS OPEN CIRCUIT RESISTANCE PHOTOCELL GENERATOR CURRENT ELECTRIC CIRCUIT POWER ELECTRIC MOTOR CLOSED CIRCUIT ELECTROMAGNET MAGNETIC DOMAINS ELECTROMAGNETIC INDUCTION THERMOCOUPLE ELECTRON DOPING MAGNETIC DOMAIN IRON GALVANOMETER PARALLEL CIRCUIT SOLENOID FERROMAGNETIC MAGNETOSPHERE