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ELECTRICITY: UNIT EXAM
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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
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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
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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