Do you know how transformers work?
Transformers and Energy Quiz
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Question 1 of 12Question 1
The primary coil of a transformer has a current of 0.6 A with a potential difference of 50V. The current in the secondary coil is 30 A. What is the potential difference across the secondary coil?
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V
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Question 2 of 12Question 2
The secondary coil of a transformer has a current of 6 A with a potential difference of 120V. The voltage in the primary coil is 20 A. What is the current across the primary coil?
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A
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Question 3 of 12Question 3
What do we call the system of transmission of electricity, from power stations to where it is needed?
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The
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Question 4 of 12Question 4
Use some of the words to fill in the blanks. You may use each word more than once.
Cooling, heating, higher, lower, current, voltages, less, more
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Complete the statements:
- When electrical energy is transferred through transmission lines, some energy is lost through of the wires.
- We can address this problem by using currents and higher .
- When the is smaller energy is wasted through .
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Question 5 of 12Question 5
What devices do we use to increase and decrease the voltage where necessary for efficient energy transmission?
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Voltage is increased using: step transformers
Voltage is decreased using step transformers
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Question 6 of 12Question 6
Which of the following are correct explanations of the effects of transformers?
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Question 7 of 12Question 7
Which type of current is used in a transformer?
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current
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Question 8 of 12Question 8
Use some of the following words to fill in the blanks. You may use each word more than once.
Initial, final, tertiary, primary, turns, secondary, current, voltage, potential difference
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Complete the statement about how transformers work
- A transformer consists of two coils – and that are wrapped around an iron core.
- A current is passed through the coil which induces a continuously changing magnetic field.
- This magnetic field induces a magnetic field in the coil.
- The magnetic field causes a to flow through the secondary coil.
- The in the secondary coil is determined by the number of in each coil.
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Question 9 of 12Question 9
Fill in the blanks, and check the hint if you need to for possible words to use.
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Complete the statement.
- Transformers can change the of an voltage
CorrectIncorrectDirect, continuous, alternating, size
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Question 10 of 12Question 10
What effect does a change in direction of current flowing through a wire have on a magnetic field?
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Question 11 of 12Question 11
What happens when you reverse the direction of the magnetic field in a transformer?
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Question 12 of 12Question 12
Which of the following factors affects the size of an induced potential difference in a transformer?
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