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WorksheetsTest 7
Total questions: 82
Worksheet time: 48mins
Name
Class
Date
1.
What type of charge does a proton have?
a)
positive
b)
negative
c)
neutral
d)
excited
2.
What type of charge does an electron have?
a)
negative
b)
positive
c)
neutral
d)
excited
3.
What is an object with an equal number of positive and negative charges?
a)
neutral
b)
negative
c)
positive
d)
charged
4.
What are arrows that indicate how a positive test charge in the field would move?
a)
lines of force
b)
lines of flux
c)
isogonic lines
d)
isoclinic lines
5.
What is transferring electric charge by direct contact?
a)
conduction
b)
induction
c)
deduction
d)
electrocution
6.
What is the process of diverting unwanted electric charge directly into the earth?
a)
grounding
b)
conducting
c)
inducting
d)
diverting
7.
What imparts electric charge without direct contact?
a)
induction
b)
conduction
c)
deduction
d)
electrocution
8.
What is the rate of electric charge flow?
a)
current
b)
voltage
c)
power
d)
resistance
9.
What is electricity that only flows in one direction without reversing?
a)
direct current
b)
alternating current
10.
What is electricity that flows first in one direction and then the other?
a)
alternating current
b)
direct current
11.
What kind of electric field has equal strength throughout?
a)
uniform field
b)
deflecting force
c)
magnetic field
d)
plasma field
12.
What moves when charge flows through an electrolyte?
a)
ions
b)
molecules
c)
lines of force
d)
electrolytes
13.
What states that opposite charges attract each other but like charges repel each other?
a)
law of electric charge
b)
law of electric force
c)
law of magnetic force
d)
Ohm's law
14.
What states that the strength of the attraction or repulsion between two charged objects is directly related to the strength of the charges and inversely related to the square of the distance between them?
a)
law of electric force
b)
law of electric charge
c)
law of magnetic force
d)
Ohm's law
15.
What relates current, voltage, and resistance?
a)
Ohm's law
b)
law of electric force
c)
law of magnetic force
d)
law of electric charge
16.
What states that unlike poles attract each other, but like poles repel each other?
a)
law of magnetic poles
b)
law of electric force
c)
law of magnetic force
d)
Ohm's law
17.
What states that the force between two magnetic poles is directly related to the product of the poles strengths and inversely related to the square of the distance between the poles?
a)
law of magnetic force
b)
law of electric force
c)
law of magnetic poles
d)
law of magnetic charge
18.
What is a simple device that uses the laws of electrostatics to detect small electric charges?
a)
electroscope
b)
ammeter
c)
ohmmeter
d)
resistor
19.
What is an electrical device designed to hinder current flow?
a)
resistor
b)
compass
c)
electroscope
d)
ammeter
20.
What is a device that transforms the energy of the electric current into another useful form of energy?
a)
load
b)
resistor
c)
electroscope
d)
switch
21.
What is a device that opens or closes a circuit?
a)
switch
b)
resistor
c)
compass
22.
What is a narrow strip of metal that prevents excessive current?
a)
fuse
b)
circuit breaker
c)
switch
d)
electroscope
23.
What is an automatic switch that opens the circuit when current flowing through it exceeds a predetermined amount?
a)
circuit breaker
b)
fuse
c)
switch
d)
electroscope
24.
What is the path that an electric current follows?
a)
circuit
b)
current
c)
voltage
d)
power
25.
What are the three parts of a simple electric current?
a)
load
b)
conductors
c)
source
d)
resistor
26.
What is a circuit that contains a complete path for electrons to flow through?
a)
closed circuit
b)
open circuit
c)
short circuit
d)
parallel circuit
27.
What is a circuit with a gap so that electrons cannot flow?
a)
open circuit
b)
closed circuit
c)
short circuit
d)
series circuit
28.
What occurs if electricity avoids the load?
a)
short circuit
b)
open circuit
c)
closed circuit
d)
parallel circuit
29.
What kind of circuit has the loads arranged so that the electric current flows through each load?
a)
series circuit
b)
parallel circuit
c)
short circuit
d)
open circuit
30.
What kind of circuit has the loads arranged in separate branches?
a)
parallel circuit
b)
series circuit
c)
short circuit
d)
open circuit
31.
What is the work per unit charge done to move electric charges?
a)
voltage
b)
current
c)
power
d)
resistance
32.
What is the SI unit of voltage?
a)
volt
b)
amp
c)
ohm
d)
watt
33.
What is the SI unit of current?
a)
amp
b)
volt
c)
ohm
d)
watt
34.
What is the SI unit of electric charge?
a)
coulumb
b)
amp
c)
ohm
d)
volt
35.
What is the product of voltage and current?
a)
power
b)
resistance
c)
current
d)
load
36.
What is the SI unit of power?
a)
watt
b)
coulumb
c)
ohm
d)
volt
37.
What are materials through which current flows easily?
a)
conductors
b)
insulators
c)
semi-conductors
d)
resistors
38.
What are materials through which current does not flow easily?
a)
insulators
b)
conductors
c)
semi-conductors
d)
super-conductors
39.
What are materials that are neither good conductors nor good insulators?
a)
semi-conductors
b)
insulators
c)
conductors
d)
resistors
40.
What is the amount a certain object hinders electron flow?
a)
resistance
b)
current
c)
voltage
d)
power
41.
What is the unit of resistance?
a)
ohm
b)
amp
c)
volt
d)
watt
42.
What is it called when the energy used to overcome resistance is converted into heat?
a)
Joule heat
b)
Ohm's heat
c)
Curie point
d)
load
43.
What is the most important factor affecting current flow through a wire?
a)
Type of material
b)
diameter
c)
length
d)
temperature
44.
How does the resistance change when the diameter of the conductor increases?
a)
decreases
b)
increases
45.
How does the resistance change when the length of the conductor increases
a)
increases
b)
decreases
46.
How does the resistance change when the temperature of the conductor increases?
a)
increases
b)
decreases
47.
What is a material that allows current to flow through it with no resistance at all?
a)
super conductor
b)
semi conductor
c)
conductors
d)
insulator
48.
What is an object capable of attracting materials by magnetic force?
a)
magnet
b)
compass
c)
electroscope
d)
fuse
49.
What is the region of concentrated magnetism?
a)
pole
b)
magnetic field
c)
domain
d)
lines of flux
50.
What are the imaginary lines that indicate the direction and strength of the magnetic field?
a)
lines of flux
b)
lines of force
c)
isogonic lines
d)
isoclinic lines
51.
What is the extent to which a material can absorb or channel lines of magnetic flux?
a)
permeability
b)
magnetically hard
c)
declination
d)
coercivity
52.
What is the most important cause of magnetism?
a)
electron spin
b)
temperature
c)
location
d)
solar wind
53.
What are substances with no unpaired electrons that are always repelled by a magnet?
a)
diamagnetic
b)
paramagnetic
c)
ferromagnetic
54.
What are substances with only one unpaired electron that are weakly attracted to a magnet?
a)
paramagnetic
b)
diamagnetic
c)
ferromagnetic
55.
What are substances with several unpaired electrons that are strongly attracted to magnets?
a)
ferromagnetic
b)
paramagnetic
c)
diamagnetic
56.
What is a substance that can be quickly magnetized?
a)
magnetically soft
b)
magnetically hard
c)
coercivity
d)
permeability
57.
What is a substance that is difficult to magnetize?
a)
magnetically hard
b)
magnetically soft
c)
coercivity
d)
permeability
58.
What is a group of aligned atoms with a single magnetic field?
a)
domain
b)
poles
c)
lines of flux
d)
magnet
59.
What are the three ways to magnetize an item?
a)
conduction
b)
induction
c)
electricity
d)
convection
60.
What is the temperature at which a ferromagnetic material’s domains disappear?
a)
Curie point
b)
Joule heat
c)
magnetically soft
d)
permeability
61.
What is the force in a magnetic field that causes a moving electric charge to deviate from its original path?
a)
deflecting force
b)
Curie point
c)
electric force
d)
uniform field
62.
Which pole is the “south-seeking” pole?
a)
North pole
b)
South pole
c)
East pole
d)
West pole
63.
Which pole is the “north-seeking” pole?
a)
South pole
b)
North pole
c)
East pole
d)
West pole
64.
What is the deviation of a compass needle from true north?
a)
declination
b)
inclination
c)
permeability
d)
coercivity
65.
What is the phenomenon in which a compass constructed with a magnet that swings vertically instead of horizontally points in the angle at which the lines of flux enter the earth?
a)
inclination
b)
declination
c)
magnetosphere
d)
coercivity
66.
What is the extent of the planet’s magnetic field in space?
a)
magnetosphere
b)
magnetopause
c)
Van Allen radiation belts
d)
aurora
67.
What is a stream of plasma that distorts the magnetosphere?
a)
solar wind
b)
aurora
c)
Van Allen radiation belts
d)
magnetopause
68.
What is the outer boundary of the magnetosphere?
a)
magnetopause
b)
magnetosphere
c)
Van Allen radiation belts
d)
aurora
69.
What are the two belts of charged particles located above Earth’s equator?
a)
Van Allen radiation belts
b)
aurora
c)
magnetopause
d)
magnetic equator
70.
What is the display of shimmering light caused by high-speed solar wind particles crashing into the air?
a)
aurora
b)
magnetopause
c)
Van Allen radiation belts
d)
solar wind
71.
What is the imaginary line that circles Earth halfway between the two magnetic poles
a)
magnetic equator
b)
aurora
c)
Van Allen radiation belts
d)
magnetopause
72.
What is the resistance of a magnet to being demagnetized by another magnetic field?
a)
coercivity
b)
permablity
c)
diamagnetism
d)
deflecting force
73.
When a load is added to a series current, resistance…
a)
increases
b)
decreases
74.
When a load is added to a parallel current, resistance
a)
decreases
b)
increases
75.
When a load is added to a series current, current…
a)
decreases
b)
increases
76.
When a load is added to a parallel current, current…
a)
increases
b)
decreases
77.
How does a highly permeable surface protect objects from a strong external magnetic field?
a)
traps the lines of flux
b)
deflects the lines of flux
c)
turns off the lines of flux
d)
permeates the lines of flux
78.
How much power does a lightbulb use if it draws 10 A of current at 100 V?
a)
10 W
b)
110 W
c)
1000 W
d)
0.1 W
79.
How much power does a lightbulb use if it draws 15 A of current at 120 V?
a)
1800 W
b)
8 W
c)
105 W
d)
135 W
80.
What is the orientation of the lines of flux when the inclination at the magnetic poles is 90*?
a)
vertical
b)
horizontal
c)
diagonal
d)
nonexistent
81.
An electromagnet's coil has 30 loops. What will happen to the strength of the electromagnet if another 30 loops are added?
a)
strength quadruples
b)
strength doubles
c)
strength halves
d)
strength stays the same
82.
The force between two charged objects is 8 N. What is the force if one of the objects is replaced by an object with half the charge?
a)
4 N
b)
16 N
c)
2 N
d)
8 N
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