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Electricity
Electricity
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1
What does the atomic number tell you?
number of electrons
number of protons
number of neutrons
total of protons, electrons & neutrons
2
Electrical force is proportional to magnitude of the charges and inversely proportional to the square of the distance
Ohm's Law
Coulomb's Law
Newton's Law
Kirchhoff's Law
3
How much is a milliamps?
1/10 amps
1/1,000,000 amps
1/100 amps
1/1,000 amps
4
How much is 9 millivolts?
9 E-12 volts
9 E-3 volts
9 E-6volts
9 E-9 volts
5
What happens to electrical force when distance is increased?
it stays the same
it increases
it depends on the charge
it decreases
6
Coulomb is used to measure ______.
Electric potential
Electric current
Electric resistance
Electric charge
7
Occam's razor states that
In order for a claim to be meaningful, it must be falsifiable.
extraordinary claims require extraordinary evidence.
if 2 explanations account for events, the simpler explanation is selected.
rival hypotheses must be ruled out.
8
Why does the light bulb not glow in the circuit below?
bell uses most of the energy
battery not charged
the bulb is not part of the complete circuit
circuit does have a switch
9
How do balloons get enough electric charge to bend water?
charging by induction
charging by credit card
charging by induction
charging by friction
10
micro-
1 / 10
1 / 1,000,000
1 / 100
1 / 1,000
11
How many volts does a car battery put out?
12 V
1.5 V
120 V
9 V
12
μ
theta
sigma
omega
mu
13
What is a Convex Mirror?
Image is smaller than the original object
The image is backwards
Image is up side down
The surface is curved outward
14
Most electricity in our lives moves by what process?
reduction
seduction
conduction
induction
15
What do you call two atoms with same atomic number but different atomic mass?
neutrons
isotopes
equilibrants
diatomics
16
What is Polarization
Going from positive charge to negative charge
When electrons concentrate on one end of an object
When electrons concentrate on opposite ends of an object
Going from a negative charge to a positive charge
17
A plane mirror is:
a shiny mirror.
a flat mirror.
a curved mirror.
a mirror used in aeroplanes.
18
Which of the following describes Coulomb's Law?
direct square
inverse square
reversing charge
cubic inverse
19
Which bulb produces the least heat?
incandescent
halogen
LED
fluorescent
20
An open circuit is when...
the path of electrons does not make a complete path
two light bulbs open the battery connected to itq
the path of electrons flows in a complete path
there is not battery attached to the circuit
21
What is an armature?
A material or device that conducts or transmits heat, electricity, or sound
The rotating coil or coils of a electric motor
The coils of an electrical outlet that allow money to be printed
A coil of wire acting as a magnet when carrying electric current
22
What letter is used to represent electric charge?
q
Σ
C
Δ
23
What does nano- mean in the metric system?
103
10-6
1012
10-9
24
What is it called when objects are charged without touching each other?
conduction
reduction
decomposition
induction
25
Why are atomic masses NOT round numbers?
nothing is perfect in nature
because pi are squared
due to significant figures
it's the average of all isotopes
26
What device was used by Charles Coulomb to illustrate induction of charges?
copper wires
generator
electroscope
nickelodeon
27
What determines the value of Coulomb's constant?
the distance
the speed of light
the medium
the magnitude of the charges
28
What is the magnitude of Coulomb's constant?
5.1E10
-1.6E-19
9E9
6.67E-
29
Ω
charge
amps
volts
ohms
30
8 megavolts is
8,000 V
8,000,000 V
8,000 V
800,000 V
31
How many whales does a kilowhale have?
100
2000
500
1000
32
Why is it possible to 'bend' water with a charged balloon?
electrons are conducted to the water
water likes balloons
because Physics is magic
water is a polar molecule
33
How many millivolts equal one volt?
1,000
10
1,000,000
100
34
What constellation is shaped like a W?
Vega
Cassiopeia
Orion's belt
The Big Dipper
35
Doc Brown used 1.21 gigawatts of electricity to power the DeLorean which was...
1.21 trillion watts
1.21 billion watts
1.21 million watts
1.21 thousand watts
36
How many Coulombs of charge does one electron have?
-9E9
-1.6E-19
-6.67E11
-6.25E18
37
The part of the bulb that gets hot and produces light:
Battery
Filament
Purple Alligators
Wires
38
An electromagnet becomes magnetic as a result of
Static electricity charges the magnet
Current electricity rearranging the electrons
A lightning strike
Electromagnets are always magnetic
39
What is the Greek word for amber?
amberoidus
electron
isotope
mu
40
What does the atomic mass tell you about and element?
the weight of the isotopes
the number of grams in one mole of that element
the number of electrons
how many grams of protons there are
41
What is grounding?
A direct physical connection to the earth
Not doing my homework
Protecting electronics and communications
Standing still
42
Short circuit means?
The current has a shorter path to flow through
The voltage will be higher
The current will not flow
The resistance will be higher
43
Who discovered the relationship between force and charge/distance?
Charles Coulomb
Andre-Marie Ampere
Allesandro Volta
Georg Ohm
44
How many atoms are in one mole of a substance?
6.25E18
6.02E23
6.67E-11
9E9
45
Ω
theta
sigma
mu
omega
46
SI units for Electric charge?
Poulomb
amps
Coulomb
volt
47
The elementary charge has a value of...
1.7 x 10-27 C
4.20 x 10-8 C
6.9 x 10-89 C
1.6 x 10-19 C
48
what are the units for Coulomb's constant?
m
N
C (coulomb)
Nm2 / C2
49
How much is a milliamps?
1/10 amps
1/1,000,000 amps
1/100 amps
1/1,000 amps
50
What are valence electrons?
Electrons that are closest to the nucleus
The electrons located in the outermost shell
The smallest electrons
Electrons that do not bond
51
Total net electrical charge equals zero.
thermodynamic charge
null set charge
conservation of electric charge
zero sum charge
52
15 kilo-ohms is
15,000,000 Ω
150,000 Ω
1,500 Ω
15,000 Ω
53
What does atomic mass tell you about an atom?
number of protons + neutrons
number of protons
number of electrons
number of neutrons
54
Doc Brown used 1.21 gigawatts of electricity to power the DeLorean which was...
1.21 E6 watts
1.21 E9 watts
1.21 E3 watts
1.21 E12 watts
55
Which bulb is the cheapest to operate?
incandescent
LED
halogen
fluorescent
56
What parts of a bulb need to make contact in the circuit for it to light?
top and bottom
bottom and side
top and side
left side and right side
57
How many microfarads equal one farad?
10
1,000
1,000,000
100
58
μ
1 / 100
1 / 1,000,000
1 / 10
1 / 1,000
59
Why do electric wires get hot?
friction
proton - electron attraction
nano sparks
nuclear reactions
