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WorksheetsTest 8
Total questions: 50
Worksheet time: 4hrs 10mins
Name
Class
Date
1.
What is a device that produces static electricity?
a)
electrostatic generator
b)
DC motor
c)
AC motor
d)
Leyden jar
2.
Who built the first electrostatic generator?
a)
Otto von Guericke
b)
Michael Faraday
c)
Benjamin Franklin
d)
Samuel morse
3.
What is the most common electrostatic generator in use today?
a)
Van de Graaff generator
b)
Leyden jar
c)
capacitator
d)
lightning
4.
What is a large discharge of static electricity between the ground and a cloud?
a)
lightning
b)
xerography
c)
St. Elmo's fire
d)
rainbow
5.
Who demonstrated that lightning is caused by static electricity?
a)
Benjamin Franklin
b)
Michael Faraday
c)
Otto von Guericke
d)
Samuel Morse
6.
What protects buildings from lightning strikes?
a)
lightning rod
b)
Leyden jar
c)
xerography
d)
Solenoid
7.
What is an accumulation of electrons around pointed objects that results in an eerie blue glow?
a)
St. Elmo's fire
b)
lightning
c)
aurora
d)
solenoid
8.
What is an early device designed by Musschenbroek used to store electric charge?
a)
Leyden jar
b)
battery
c)
capacitator
d)
Franklin wire
9.
Where is electricity stored in a Leyden jar?
a)
on the foil inside a glass jar
b)
on the foil outside a glass jar
c)
in the glass
d)
in the water inside a glass jar
10.
What is a device used to store a static electric charge?
a)
capacitor
b)
battery
c)
Leyden jar
d)
Van de Graaff generator
11.
What is an electrostatic method of reproducing images on paper?
a)
xerography
b)
photography
c)
Morse code
d)
Electromagnetic induction
12.
What produces light by heating a thin piece of wire?
a)
incandescent lamp
b)
fluorescent lamp
c)
light-emitting diode
d)
neon lamp
13.
What was the first electric light suitable for household use?
a)
incandescent lamp
b)
fluorescent lamp
c)
light-emitting diode
d)
neon lamp
14.
What produces light by passing an electric current through a narrow tube of gas?
a)
fluorescent lamps
b)
incandescent lamp
c)
light-emitting diode
d)
neon lamp
15.
What is a material that glows when exposed to radiation?
a)
phosphor
b)
radioactive
c)
St. Elmo's fire
d)
cathode
16.
What is a lamp with a long coiled tube that can be used in regular sockets?
a)
CFL
b)
fluorescent lamp
c)
light-emitting diode
d)
neon lamp
17.
What is an electric discharge lamp filled with neon gas?
a)
neon lamp
b)
fluorescent lamp
c)
CFL
d)
light-emitting diode
18.
What is a semiconductor device that emits light when direct current is applied?
a)
light emiiting diode
b)
fluorescent lamp
c)
CFL
d)
neon lamp
19.
Which type of light bulb is most efficient?
a)
light emitting diode
b)
fluorescent lamp
c)
incandescent lamp
d)
neon lamp
20.
What converts electricity into back-and-forth motion?
a)
solenoid
b)
relay
c)
AC motor
d)
alternator
21.
What uses electromagnets to allow communication over long distances?
a)
telegraph
b)
loudspeaker
c)
relay
d)
rectifier
22.
What is an electrical switch operated by an electromagnet?
a)
relay
b)
solenoid
c)
transformer
d)
xerography
23.
What converts pulses of electricity into sound waves?
a)
loudspeaker
b)
telegraph
c)
solenoid
d)
relay
24.
What is the most important device for converting electricity into motion?
a)
electric motor
b)
electric generator
c)
electrostatic generator
d)
transformer
25.
What is a permanent magnet used to provide a stationary magnetic field?
a)
field magnet
b)
armature
c)
rectifier
d)
capacitator
26.
What is a freely rotating electromagnet mounted on a shaft?
a)
armature
b)
commutator
c)
field magnet
d)
rectifier
27.
What is a device in a DC motor or generator that reverses the current in the armature?
a)
commutator
b)
field magnet
c)
alternator
d)
rectifier
28.
What is the part of an AC motor that keeps the wires from twisting?
a)
slip rings
b)
commutator
c)
armature
d)
field magnet
29.
Which type of battery is not designed to be recharged?
a)
voltaic cells
b)
storage cells
c)
photovoltaic cells
d)
capacitator
30.
Which type of battery can be recharged by sending current through them backwards?
a)
storage cells
b)
voltaic cells
c)
photovoltaic cells
d)
capacitator
31.
What is the positive terminal of a voltaic cell?
a)
cathode
b)
anode
32.
What is the negative terminal of a voltaic cell?
a)
anode
b)
cathode
33.
What is one or more electrochemical cells connected to terminals as a single source of current?
a)
battery
b)
voltaic cell
c)
storage cell
d)
capacitator
34.
What is the ability of magnetism to convert mechanical motion into electric current?
a)
electromagnetic induction
b)
solenoid
c)
transformer
d)
electrostatic generator
35.
Who discovered that mechanical motion can directly produce electric current by magnetic force?
a)
Michael Faraday
b)
Benjamin Franklin
c)
Otto von Guericke
d)
Samuel Morse
36.
What is a device that uses electromagnetic induction to produce electricity?
a)
electric generator
b)
electric motor
c)
electrostatic generator
d)
Solenoid
37.
What is a small AC generator that recharges a car's battery and operates the car's electrical system while the car is running?
a)
alternator
b)
rectifier
c)
armature
d)
commutator
38.
What changes AC to DC?
a)
rectifier
b)
alternator
c)
transformer
d)
commutator
39.
What is a conducting fluid that passes through a magnetic field at high speed to generate electricity?
a)
magnetohydrodynamic generator
b)
electric genrator
c)
electrostatic generator
d)
Electromagnetic induction
40.
What converts absorbed sunlight directly into electricity?
a)
photovoltaic cell
b)
voltaic cell
c)
storage cell
d)
capacitator
41.
What is a device that increases or decreases the voltage of alternating current?
a)
transformer
b)
alternator
c)
commutator
d)
armature
42.
Two 4 V electrochemical cells can each produce 0.7 A of current. What is the voltage and total possible current when these cells are connected in parallel?
a)
4 V, 1.4 A
b)
8 V, 0.7 A
c)
8 V, 1.4 A
d)
4 V, 0.7 A
43.
Five 9 V electrochemical cells can each produce 2 A of current. What is the voltage and total possible current when these cells are connected in parallel?
a)
9 V, 10 A
b)
45 V, 2 A
c)
45 V, 10 A
d)
9 V, 2 A
44.
Two 4 V electrochemical cells can each produce 0.7 A of current. What is the voltage and total possible current when these cells are connected in series?
a)
8 V, 0.7 A
b)
4 V, 1.4 A
c)
8 V, 1.4 A
d)
4 V, 0.7 A
45.
Five 9 V electrochemical cells can each produce 2 A of current. What is the voltage and total possible current when these cells are connected in series?
a)
45 V, 2 A
b)
9 V, 10 A
c)
45 V, 10 A
d)
9 V, 2 A
46.
How should electrochemical cells be arranged to boost voltage?
a)
series
b)
parallel
47.
How should electrochemical cells be arranged to boost current?
a)
parallel
b)
series
48.
What system of communication uses a combination of long and short clicks to transmit messages over long distances?
a)
Morse code
b)
telegraph
c)
xerography
d)
solenoid
49.
Who invented the telegraph?
a)
Samuel Morse
b)
Benjamin Franklin
c)
Otto von Guericke
d)
Michael Faraday
50.
What type of electric generator uses a commutator?
a)
DC generator
b)
AC generator
c)
DC motor
d)
AC motor
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