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WorksheetsUnit 32_Fault-find and rectify complex electrical circuits
Total questions: 60
Worksheet time: 2hrs 59mins
What are electrons?
Negatively charged subatomic particles.
Positively charged subatomic particles.
Neutrally charged subatomic particles.
Negatively charged atoms.
Which word best describes electricity as it occurs in nature?
Orderly.
Stationary.
Sudden.
Powerless.
Why is static electricity not useful as a power source?
Because electrons aren't transferred in bursts of static electricity.
Because all energy is released at once in static electricity.
Because static electricity is not a real form of electricity.
Because static electricity only occurs in lightning.
What is a current?
A steady flow of electricity.
A short burst of electricity.
A wire along which electricity flows.
A power source that supplies electricity.
What is the function of a power source in a circuit?
It provides a steady source of static electricity.
It provides a means through which the circuit can be broken.
It provides a path along which the electricity can flow.
It provides a steady flow of electrons.
How does rubber differ from most metals?
Rubber is a good conductor; most metals are good insulators.
Rubber conducts electrons; most metals conduct protons.
Rubber is a good insulator; most metals are good conductors.
Rubber is a good power source; most metals are good conductors.
What might happen if wires weren't insulated?
The power source would no longer provide a flow of electrons.
We'd be in danger of harm from electric shocks.
Current electricity would become static electricity.
The circuit would be broken
What device opens and closes an electric circuit?
A switch.
A power source.
A load.
current
What happens if you disconnect a circuit from its positive terminal?
The electrons shoot out from the negative terminal.
The electrons stop flowing, and the current stops.
The current reverses direction.
Nothing happens.
If two charges repel each other, the two charges must be...
positive and positive
positive and negative
negative and negative
either a or c
What type of current comes from the outlets in your home?
direct current
alternating current
electric discharge
static electricity
Cells are made of...
a conducting wire and a grounded wire
an electrolyte and a pair of electrodes
a conductor and a insulator
none of the above
In order to produce a current from a cell, the electrodes of the cell must...
have a potential difference
be in a liquid
be exposed to light
be at two different temperatures
Fine the resistance of a circuit that draws 1.5A when 3.0V are applied
1.5 Ohms
3.0 Ohms
4.5 Ohms
none of the above
A circuit in which all parts are connected in a single loop is called a(n)...
open circuit
open load
series circuit
parallel circuit
Charges continually switch from flowing in one direction to flowing in the reverse direction in...
alternating current
static electricity
all types of current
direct current
Which of the following might cause a circuit to fail?
connecting a series circuit to a parallel circuit
plugging too many devices into one outlet
failing to press the TEST button on a circuit breaker box
all of the above
When voltage is increased and resistance is constant, current...
increases
decreases
is constant
cannot be determined
All circuits include...
an energy source, a load, and wires
an energy source, a resistor, and a battery
a battery, a light bulb, and a switch
a battery, wires and a switch
Which of the following states the correct flow of conventional current?
positive to positive terminal
positive to negative terminal
negative to positive terminal
negative to negative terminal
Which of the following states the correct flow of electron flow in a circuit?
positive to positive terminal
positive to negative terminal
negative to positive terminal
negative to negative terminal
Which of the following is the symbol for current?
I
A
R
V
Which of the following is the symbol for S.I unit of current?
I
A
R
V
Which of the following is the S.I unit for current?
Ampere
Volts
Ohm
Non above
Which of the following is the symbol for voltage?
I
A
R
V
Which of the following is the symbol for S.I unit of voltage?
I
A
R
V
Which of the following is the S.I unit for voltage?
Ampere
Volts
Ohm
I
Which of the following can be used to measure current?
Ammeter
Voltmeter
Current meter
Meter rule
Which of the following can be used to measure voltage?
Ammeter
Voltmeter
Current meter
Meter rule
Which best describes a simple series circuit?
Electricity flows along one pathway.
The flow of electricity comes from the switch
Electricity flows along many pathways.
The flow of electricity comes from the light bulb.
Which best describes a parallel circuit?
Electricity flows along one pathway.
The flow of electricity comes from more than one source.
Electricity flows along more than one pathway.
The flow of electricity comes from more than 1 load
What is a circuit?
A pathway that electricity flows in. It has a load, wire
A pathway that protons flow in. It has a load, wire, and a power source.
A pathway that electricity flows in. It has a load, wire, and a power source.
A pathway that electricity flows in. It has a load and wire.
A pathway for electricity to travel is called___________
current
static electricity
circuit
Non above
A continuous flow of electricity is called_____________
series
circuit
static
current
In a parallel circuit if one light bulb goes OUT; then they ALL go out. TRUE OR FALSE?
TRUE
FALSE
What is a switch's function in a circuit?
to make the current hotter or colder
turn on and off the flow of current
the pathway that current flows
to add more power to the circuit
Pick the correct sentence.
This circuit will work because it is a closed circuit.
Energy will freely flow in this circuit.
This circuit will not work because there is no energy source.
This circuit will not work because there is no switch
A open circuit allows charges to flow.
True
False
A closed circuit allows charges to flow.
True
False
In a Series circuit the more light bulbs you add the brighter they get
False
True
What is a Parallel circuit?
Has only one path
Has more than one path
Allows energy to travel through easily
All the above
When there is only one path for electrons to move through it is called a _____. When one light goes out, they all go out
closed circuit
parallel circuit
series circuit
open circuit
This is needed in a circuit to start the electrons moving.
battery
power source
switch
wire
This circuit has more than one loop. When one light goes out, the others stay on.
closed circuit
series circuit
parallel circuit
open circuit
If a circuit is incomplete, or broken, it is a(n) ________ circuit.
closed
closed
bad
open
Electromotive force (electrical pressure) is measured in:
Amperage
Voltage
Watts
Ohms
Resistance is measured in
Amperage
Voltage
Watts
Ohms
Current Flow is measured in
Amperage
Voltage
Watts
Ohms
Resistance in an electrical circuit is affected by all of these EXCEPT the
temperature of the conductor
diameter of the conductor
length of the conductor
color coding of the conductor
What is an example open circuit?
Wire that has rubbed into a power wire
A break in the wire
Wire that has rubbed into the ground
All of the above
Fuses are designed to limit the amount of
Resistance
Amperage
Voltage
None of the above
When checking circuit continuity with an ohmmeter:
the reading will be given in Amperes
the power supplied to the circuit during operation MUST be switched ON.
the power supplied to the circuit during operation MUST be switched OFF.
the reading will be given in Volts
What is an example short circuit?
Wire that has rubbed into a power wire
A break in the wire
Wire that has rubbed into the ground
All of the above
A test light can be used to check
Ground
Resistance
Amperage
Voltage drop
Electricity can be defined as the flow of:
Electrons
Atoms
Protons
Neutrons
The fuse in a circuit melts when:
An appliance isn't earthed
Too much current flows
Too much voltage flows
All the above
A double insulated appliance does not need:
A fuse
A earth wire
A neutral wire
All the above
A device that contains a thin strip of metal that melts easily if the current in the circuit is too high
Fuse
resistor
earth wire
battery
Which of the following PPE should be worn when working with electricity?
Metal hard hat and insulated gloves & clothing
Non-metallic hard hat and insulated gloves & clothing
Non-metallic hard hat and non-insulated gloves & clothing
Metal hard hat and no insulated gloves & clothing
Which is not an application of Ohm's Law?
Troubleshooting circuits
Sizing components
Creating multiple voltage levels
None of the above
