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WorksheetsElectricity 1.0 Review
Total questions: 71
Worksheet time: 1hrs 11mins
Which subatomic particle is easily moved?
Proton
Electron
Neutron
What type of charge does this balloon have?
Positive
Negative
Neutral
An object becomes charged when it rubs against another charged object.
charge separation
electrical discharge
friction
When you rub a balloon up against your shirt, the shirt becomes positively charged. This means that
more protons were created on the shirt.
electrons left the shirt and moved to the balloon.
protons left the balloon and moved to the shirt.
neutrons left the shirt and moved to the balloon.
Will the balloons ATTRACT or REPEL each other?
unlike charges
Ms Pippin rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?
The balloons will repel each other.
The balloons will attract each other.
The balloons will become positively (+) charged.
The balloons will pop.
What happens when you touch a metal doorknob after rubbing your shoes on the carpet?
The doorknob sends a burst of electric current into your body
Millions of electrons go from your finger into the doorknob
The doorknob sends millions of electrons into your finger
Your finger becomes negatively charged
According to the illustration, the charge on Object A is ______________, and the charge on Object C is ______________.
negative, positive or neutral
positive or neutral, negative
positive, positive
negative, negative
Why does a Van de Graaff generator make your hair stand up if you touch the dome?
The current is trying to flow out of the hair ends.
The electrons gather on the hair ends and repel each other.
The hair is repelled by the dome of the Van de Graaff generator.
The hair is attracted to the surrounding air.
Charged objects attract neutral objects because
of charge separation (polarization) in the neutral oject
electrons flow from one object to the next
of electrical discharge
of current flow of electricity
Your polyester shirt is rubbing against your skin. Electrons will move:
From your skin to the polyester.
From the polyester to your skin.
Who knows? I'm just here for the popcorn...
What is an electric current?
a build up of electrons
the difference in charge between 2 points
the flow of electrons over a circuit
the opposition to flow of electrons
Which statement is true?
The light bulb will light up because the circuit is complete.
The light bulb will light up because the circuit is broken.
The light bulb will not light up because the circuit is complete.
The light bulb will not light up because the circuit is open.
When the switch is closed the buzzer will sound because -
Which schematic circuit matches this circuit picture?
What components are in this schematic diagram?
battery, switch, bulb, wire
switch, switch, bulb
battery, switch, bulb, motor
In the diagram above, identify circuit component D.
Switch
Transformer
Conductor
Source
What would happen if an extra battery cell is added?
A PATH along which electricity can flow is a ___________________?
light bulb
switch
insulator
circuit
The path of electricity through a circuit
Electrons move from the negative terminal of battery, through all components, and return to the positive terminal of the battery.
Electrons move from the positive terminal of battery, through all components, and return to the negative terminal of the battery.
Electrons come from the negative terminal of battery and are absorbed by circuit components.
Electrons come from the positive terminal of battery and are absorbed by circuit components.
A student is testing the conductivity of 4 different substances. He uses a 2.5 V battery and records the current in the circuit in each of the 4 substances. The chart below indicates the current measured.
Which substance is most likely an insulator?
Substance Q
Substance R
Substance S
Substance T
What is the purpose of a lightning rod?
So birds won't sit on the roof
To look cool
To safely send electric charges from lightning into the ground
A connection that allows current to take the path of least resistance through no loads is a
short circuit
long circuit
parallel circuit
series circuit
Look at the picture. Why is it notallowed
Because it will make people stumble and hurt
Because it makes the house messy
Because creates the risk of wire overheating from too much current being drawn.
Because it incurs huge electricity bills from too much energy
Without a fuse or circuit breaker, what might happen in a house with an overloaded electric circuit?
the thin piece of metal would melt, breaking the circuit
the metal band would heat up, disrupting the circuit
a fire would start
the electricity for the house would turn off
You want to build a device that can conduct current, but that will be safe if touched by a person. Which of the following pairs of materials could you use?
glass for the conductor and rubber for the insulator
copper for the insulator and silver for the conductor
sand for the conductor and plastic for the insulator
plastic for the insulator and silver for the conductor
What is the difference between a fuse and a circuit breaker?
a fuse can only be used once and a circuit breaker is reusable
a fuse is reusable and a circuit breaker can only be used once
both fuses and circuit breakers can only be used once
both fuses and circuit breakers are reusable
Which is more dangerous to humans?
high voltage
high current
In the model, what do the arrows represent?
The flow of current
The flow of resistance
The flow of voltage
The flow of positrons
In this model, the pump that pushes water round the system represents the
battery
electricity
voltmeter
bulb
In this model, the pipes are like ....... they carry ......... round the circuit
wires; voltage
bulbs; current
bulbs; voltage
wires; current
If an electrical circuit were analogous to a water circuit at a water park, then the battery voltage would be comparable to ___________________.
the rate at which water flows through the circuit
the speed at which water flows through the circuit
the distance that water flows through the circuit
the water pressure between the top and bottom of the circuit
the hindrance caused by obstacles in the path of the moving water
In this model, the moped riders represent the
power pack
bulbs
flow of charge
ammeter
In this model, the electrical energy carried around the circuit is represented as the
pizza
party goers
party house
roads going back and forth the house
In the traffic model of electricity, match the following components
speed bumps
resistance
traffic light
switch
gas station
battery
roads
wires
Based on the model, which of the following would be true regarding the relationship between voltage, current, and resistance?
Current will reduce voltage.
Current will not pass through resistance.
Resistance will reduce current.
Voltage will reduce resistance.
Which of the following has the least resistance?
Long, thin wires
Short, thick wires
Long, thick wires
Short, thin wires
According to Ohm's Law, If you decrease the voltage of circuit, what happens to the current?
decreases
increases
stays the same
If the Voltage stays the same and Resistance is increased, Current will
Increase
Decrease
Stay the same
Based on the graph, which of the following would be true regarding the relationship of voltage and current?
As voltage increases, current decreases.
Voltage will not affect current.
As voltage decreases, current increases.
As voltage increases, current also increases.
If the voltage is 200 volts, what is the value of the current?
10 A
20 A
30 A
40 A
What is the formula for voltage?
V = (I x R) / 2
V = I / R
V = R / I
V = I x R
what is the resistance of a lamp whose current is 6 A and the voltage across it is 120 V?
120 0hm
20 ohm
16 ohm
10 ohm
Which of the following changes to the cell shown above would result in voltage being produced?
Reversing the leads on the voltmeter
Using a greater volume of sulfuric acid
Replacing 5% sulfuric acid with 20% sulfuric acid
Changing one of the electrodes to a zinc electrode
In the diagram, the copper penny and paper clip function as
sites of electrical insulation
electrolytes
electrodes
sites of electrical energy storage
What kind of cell is this?
electrochemical cell
electrolytic cell
What kind of cell is this?
electrochemical cell
electrolytic cell
What was the manipulated variable in this lab?
type of wet cell
acid concentration
voltage
acid concentration vs voltage
What is the relationship between acid concentration and voltage?
the the greater the acid concentration the greater the voltage
the the greater the acid concentration the lower the voltage
acid concentration is not related to Voltage
