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WorksheetsChapter 10 Transformer Basics
Total questions: 20
Worksheet time: 10mins
What does a transformer do?
changes the color of electricity
makes electricity stronger or weaker
stores electricity
increases the power of stations
What does a transformer change?
the speed of electricity
the direction of electricity
the amount of voltage in electricity
the color of electricity
What are the two main parts of a transformer?
copper wire and metal box
primary coil and secondary coil
power source and ground
power coil and neutral coil
Which part of the transformer takes in electricity?
primary coil
secondary coil
neutral coil
grounding coil
What happens when a transformer increases the voltage?
the current stays the same
the current gets bigger
the current gets smaller
the electricity gets stored
What does the secondary coil in a transformer do?
receives electricity and sends it out at a different voltage
protects the transformer from damage
increases the current
reduces the voltage to zero
What is true about how well a transformer works?
a transformer should waste a lot of energy
a good transformer wastes less energy
the more energy a transformer wastes, the better it works
efficiency doesn't matter in a transformer
What type of transformer is most often used at power stations?
step-up transformer
step-down transformer
constant-current transformer
control transformer
What is the main job of a step-up transformer?
reduces voltage for home use
increases voltage for long-distance transmission
changes the flow direction of electricity
controls the speed of electricity
What kind of transformer is used to make electricity safe for use in homes?
step-up transformer
step-down transformer
constant-current transformer
potential transformer
What does a potential transformer do?
increases the current
reduces the voltage
measures the voltage and makes it safe
changes the color of electricity
Why is grounding important for transformers?
it makes the transformer stronger
it helps send extra electricity safely into the earth
it increases the voltage
it makes the transformer cheaper
What does a control transformer do?
changes the frequency of electricity
controls power for machines and devices
increases the speed of electricity
increases the amount of electricity
Which part of the transformer changes the voltage of the electricity?
the wire
the core
the coils
the outer casing
What does the efficiency of a transformer depend on?
the size of the transformer
how much voltage is in the system
the energy lost as heat and noise
the color of the wires
Why do we use transformers in electrical systems?
to make electricity move faster
to change the amount of electricity in the system
to change high voltage electricity to a safe level for use
to store extra energy
In a transformer, if the primary coil has more coils than the secondary coil, what happens?
the voltage increases
the voltage decreases
the voltage stays the same
the transformer doesn't work
Which transformer do you use to increase voltage for long-distance power transmission?
step-up transformer
step-down transformer
control transformer
potential transformer
How are voltage and current related in a transformer?
both voltage and current alway increase
when voltage goes up, current goes down
when current goes up, voltage goes up
voltage and current don't change in a transformer
20. What is the main use of transformers in homes?
to change the frequency of electricity
to make electricity stronger
to reduce high voltage to a safe level for homes
to store electricity for later use
