Electromagnetic induction and generators

In this lesson we explore how a potential difference can be generated by moving a wire in a magnetic field and how this is used in ac generators to make electricity for the National Grid.

Video

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Worksheet

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Quiz:

Electromagnetic Induction (Physics only)

This quiz will help you to consolidate your learning on Electromagnetic Induction and alternators

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Q1.Which sentence below describes electromagnetic induction?

1/9

Q2.What is the word that describes when a potential difference is made in a coil?

2/9

Q3.Which scientist first discovered electromagnetic induction?

3/9

Q4.Which of these would not cause the direction of the potential difference to reverse when using a coil and a magnet to demonstrate the generator effect?

4/9

Q5.Which term refers to when a conductor and wire move across each other?

5/9

Q6.In which of these situations will there not be an induced potential difference?

6/9

Q7.Which direction will the magnetic field made by the induced current be?

7/9

Q8.Decide if each statement below is true or false.

A potential difference will be induced if the magnet is held stationary the coil.

An electric current will flow if the ends of the coil are connected to an external circuit.

A potential difference will not be induced if the magnet is moved up and down inside the coil.

An induced current generates a magnetic field that opposes the original change, either the movement of the conductor or the change in magnetic field.

8/9

Q9.Which of the following will increase the size of the induced potential difference

9/9

Quiz:

Electromagnetic Induction (Physics only)

This quiz will help you to consolidate your learning on Electromagnetic Induction and alternators

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Q1.Which sentence below describes electromagnetic induction?

1/9

Q2.What is the word that describes when a potential difference is made in a coil?

2/9

Q3.Which scientist first discovered electromagnetic induction?

3/9

Q4.Which of these would not cause the direction of the potential difference to reverse when using a coil and a magnet to demonstrate the generator effect?

4/9

Q5.Which term refers to when a conductor and wire move across each other?

5/9

Q6.In which of these situations will there not be an induced potential difference?

6/9

Q7.Which direction will the magnetic field made by the induced current be?

7/9

Q8.Decide if each statement below is true or false.

A potential difference will be induced if the magnet is held stationary the coil.

An electric current will flow if the ends of the coil are connected to an external circuit.

A potential difference will not be induced if the magnet is moved up and down inside the coil.

An induced current generates a magnetic field that opposes the original change, either the movement of the conductor or the change in magnetic field.

8/9

Q9.Which of the following will increase the size of the induced potential difference

9/9

Lesson summary: Electromagnetic induction and generators

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The next lesson in Magnetism is "Electromagnetic devices"

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