P7 Magnetism Revision (Part 2)

This lesson revises the Magnetism subject knowledge unique to the GCSE Physics course and gives an opportunity to work through some exam style questions.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Which of the following would not be attracted to a permanent magnet?

1/8

Q2.Some students were asked to draw out the shape of a magnetic field around a bar magnet. Which student got their drawing completely correct?

2/8

Q3.Which of these methods could be used to find the shape and direction of the magnetic field of a bar magnet?

3/8

Q4.Decide which arrangements would attract, repel or do nothing.
A
B
C
D

4/8

Q5.Which way will the current be flowing to create a magnetic field in the direction shown by the plotting compasses?

5/8

Q6.Sort the statement below into true and false statements.
Magnetic field lines (known as lines of magnetic flux) are closer together when the field strength is stronger.
The strength of the magnetic field around a current carrying conductor (a wire) is the same no matter what distance.
Electromagnets can be made stronger with an iron core placed in the centre.
An electromagnet is a form of permanent magnet.

6/8

Q7.HT only : Which way will the force be exerted on the wire?

7/8

Q8.HT only : Calculate the magnetic flux density when a force of 5N is exerted on a 0.25m wire carrying a current of 2A. Use the equation F = B × I × L

8/8

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Which of the following would not be attracted to a permanent magnet?

1/8

Q2.Some students were asked to draw out the shape of a magnetic field around a bar magnet. Which student got their drawing completely correct?

2/8

Q3.Which of these methods could be used to find the shape and direction of the magnetic field of a bar magnet?

3/8

Q4.Decide which arrangements would attract, repel or do nothing.
A
B
C
D

4/8

Q5.Which way will the current be flowing to create a magnetic field in the direction shown by the plotting compasses?

5/8

Q6.Sort the statement below into true and false statements.
Magnetic field lines (known as lines of magnetic flux) are closer together when the field strength is stronger.
The strength of the magnetic field around a current carrying conductor (a wire) is the same no matter what distance.
Electromagnets can be made stronger with an iron core placed in the centre.
An electromagnet is a form of permanent magnet.

6/8

Q7.HT only : Which way will the force be exerted on the wire?

7/8

Q8.HT only : Calculate the magnetic flux density when a force of 5N is exerted on a 0.25m wire carrying a current of 2A. Use the equation F = B × I × L

8/8

Video

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Worksheet

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This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Magnetism Review 2(Physics only)

This quiz will help you to consolidate your learning on the Physics only aspects of Magnetism.

Q1.Which of these statements best describes, using correct scientific terminology, the generator effect, also known as electromagnetic induction.

1/7

Q2.Which of the following would NOT result in the direction of induced potential difference being reversed in a dynamo?

2/7

Q3.Sort the statements below into true or false.
A moving-coil microphone uses the motor effect to produce an alternating current.
A loudspeakers output can be made louder by using a stronger magnetic field.
The frequency of sound produced by a loudspeaker matches the frequency of the alternating current input.
Pressure waves in the air directly cause the coil of a microphone to move.

3/7

Q4.Choose some of the sentences below, and place them in the correct order, to explain how a transformer works.
As lines of magnetic flux are cut by the secondary coil, an alternating potential difference is created.
The core transfers the alternating magnetic field through to the secondary coil.
The large magnetic field creates a large potential difference in the core.
An alternating current in the primary coil creates an alternating magnetic field in the core.
The split-ring commutator swaps the connections over to ensure the output is direct current.

4/7

Q5.A step-down transformer has an output of 15A at a potential difference of 12V, and an input potential difference of 230V. What is the input current? Use the equations Vp × Ip = Vs × Is or Np / Ns = Vp / Vs

5/7

Q6.A step-up transformer has 2,550 coils on the primary coil and 35,000 coils on the secondary coil. The output potential difference is 440,000 V. What is the input potential difference? Use the equations Vp × Ip = Vs × Is or Np / Ns = Vp / Vs

6/7

Q7.A step-down transformer has 450 coils on the primary coil and 100 coils on the secondary coil. A current of 2.3 A supplies the transformer. What is the output current? Use the equations Vp × Ip = Vs × Is and Np / Ns = Vp / Vs

7/7

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Magnetism Review 2(Physics only)

This quiz will help you to consolidate your learning on the Physics only aspects of Magnetism.

Q1.Which of these statements best describes, using correct scientific terminology, the generator effect, also known as electromagnetic induction.

1/7

Q2.Which of the following would NOT result in the direction of induced potential difference being reversed in a dynamo?

2/7

Q3.Sort the statements below into true or false.
A moving-coil microphone uses the motor effect to produce an alternating current.
A loudspeakers output can be made louder by using a stronger magnetic field.
The frequency of sound produced by a loudspeaker matches the frequency of the alternating current input.
Pressure waves in the air directly cause the coil of a microphone to move.

3/7

Q4.Choose some of the sentences below, and place them in the correct order, to explain how a transformer works.
As lines of magnetic flux are cut by the secondary coil, an alternating potential difference is created.
The core transfers the alternating magnetic field through to the secondary coil.
The large magnetic field creates a large potential difference in the core.
An alternating current in the primary coil creates an alternating magnetic field in the core.
The split-ring commutator swaps the connections over to ensure the output is direct current.

4/7

Q5.A step-down transformer has an output of 15A at a potential difference of 12V, and an input potential difference of 230V. What is the input current? Use the equations Vp × Ip = Vs × Is or Np / Ns = Vp / Vs

5/7

Q6.A step-up transformer has 2,550 coils on the primary coil and 35,000 coils on the secondary coil. The output potential difference is 440,000 V. What is the input potential difference? Use the equations Vp × Ip = Vs × Is or Np / Ns = Vp / Vs

6/7

Q7.A step-down transformer has 450 coils on the primary coil and 100 coils on the secondary coil. A current of 2.3 A supplies the transformer. What is the output current? Use the equations Vp × Ip = Vs × Is and Np / Ns = Vp / Vs

7/7

Lesson summary: P7 Magnetism Revision (Part 2)

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This was the final lesson in the unit Magnetism.

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