IGCSE Physics Review: Magnetism and Electricity

​Chapter 16. Magnetism

IGCSE Physics​

​Learning Objectives

​CIE Syllabus 0625 2022

1. ​Describe magnetic forces between magnets, and between magnetic and non magnetic materials

2. ​Distinguish between hard and soft magnetic materials

3. Describe an experiment to identify the pattern of magnetic field lines around a magnet

4. Distinguish between the design and use of a permanent magnet and an electromagnet

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CUP Textbook pages​ 294 - 304

Multiple Choice

What is the rule of magnetism?

• opposite poles attract;

  same poles repel

• opposite sides attract; same sides repel

• opposite poles repel; same poles attract

• opposite charge attract; same charge repel

​Describe ​magnetic forces magnets and magnetic materials

​What elements are magnetic?

Open Ended

Describe a method to determine the shape or direction of a magnetic field

What is a device that you can use to find the direction of a magnetic field?

Describe an experiment to identify t​he pattern of magnetic field lines

Multiple Choice

Define what is a magnetic field?

• a region of space that a charge would experience an electric force

• a region of space that a charge would experience a magnetic force

• a region of space that a material would experience a magnetic force

• a region of space that a mass would experience a gravitational force

Draw

Draw at least 3 magnetic fields lines to show how these two magnets interact

​Give 3 rules when drawing field lines

Describe an experiment to identify t​he pattern of magnetic field lines

Multiple Choice

If you hold a magnet by a string, why does it swing at a certain direction?

• because somebody is holding another magnet nearby

• It is attracted to the Earth's magnetic field

• because there is a lost spirit trying to contact you

• because someone has magical potential

Describe an experiment to identify t​he pattern of magnetic field lines

Multiple Choice

What is the difference between soft and hard magnetic material?

• soft magnetic materials are made from non-metals and hard magnetic materials are metails

• soft materials can be temporarily magnetized and hard materials can be permanently magnetized

• soft materials have weak magnetism and hard materials have strong magnetism

• soft materials are non magnetic and hard materials are magnetic

Multiple Choice

What is the difference between a permanent magnet and an electromagnet?

• Electromagnets can be turned off, while permanent magnets cannot.

• Electromagnets power can be controlled by changing the current running through it.

• Permanent magnets are useful for compasses, generators and motors or devices that needs a constant magnetic field to work.

• All of these

​Distinguish between hard and soft magnetic materials

​Distinguish the design and use of permanent magnets and electromagnets​

Open Ended

With your knowledge of magnetism, what do you think produces the magnetic field of Earth? Is there a giant magnet inside the core of the planet?

​Success Criteria

​CIE Syllabus 0625 2022

1. Describe the forces between magnets, and between magnets and magnetic materials

2. Distinguish between the magnetic properties of soft iron and steel

3. Describe an experiment to identify t​he pattern of magnetic field lines

4. Distinguish between and use of permanent magnets and electromagnets

CUP Textbook pages​ 294 - 304

​Chapter 17

Static Electricity

IGCSE Physics

​Learning Objectives

​CIE Syllabus 0625 2022

1. Differentiate between negative and positive charges.

2. Explain static electricity in terms of gaining or losing electrons

3. ​Distinguish between electrical conductors and insulators

4. Describe electrical fields

CUP Textbook pages​ 309-320

Multiple Choice

Define what is static electricity?

• electrons that are flowing through your body

• electrons that are not moving but can build up and discharge

• protons and electrons that are moving

• protons that are not moving but can build up and discharge

​Differentiate between negative and positive charges.

​Where are the charges coming from?

Multiple Choice

What are the 2 processes of producing a charged object?

• induction and insulation

• friction and conduction

• conduction and insulation

• friction and induction

​Explain static electricity in terms of gaining or losing electrons

Multiple Choice

Two uncharged metal spheres X and Y rest on insulating stands and touch each other. A negatively charged plastic rod is brought near to sphere X.

Using the insulating stand, sphere Y is moved away from sphere X. What are the signs of the charges induced on X and Y?

• X is negative

  Y is negative

• X is negative

  Y is positive

• X positive

  Y is positive

• X is positive

  Y is negative

​Describe electrical fields

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Multiple Choice

With the teacher demo of a plasma ball and flourescent lamp, how would you explain the reason that the lamp lights up as it nears the plasma ball?

• the electrons of the plasma ball creates a circuit inside the lamp

• the energy of the charged particles of the plasma ball is able to heat up the lamp

• the energy of the charge particles of the plasma ball is able to transfer its energy to the gas particles inside the lamp

• the electrical field created by the plasma ball is enough to excite/ energize the atoms of the gas inside the lamp

Multiple Choice

If you were in a lightning storm, where you can find a large tree, an open field and a car. Where would you hide?

• under the large tree

• lay down as low in an open field

• inside the car

• underneath the car

​Chapter 18

Electric Quantities​

IGCSE Physics

​Learning Objectives

​CIE Syllabus 0625 2022

1. Learn about electric current, resistance and voltage

2. Describe an experiment to determine resistance using ammeters and voltmeters

3. Learn how the resistance of a w​ire relates to its length and diameter

4. Understand that energy is transferred from the power source to the circuit of the components.

5. Calculate resitance, electrical power and energy​

CUP Textbook pages​ 320-343

​Distinguish between electrical conductors and insulators

Draw

Draw and label a basic circuit

​Learn about electric current, resistance and voltage

​​Learn about electric current, resistance and voltage

Fill in the Blanks

What do you call the ratio of proportionality between current and voltage? (one word only in small caps)

​​​Learn about electric current, resistance and voltage

Fill in the Blanks

Name a factor that affects resistance? (one word, small caps)

Open Ended

If resistance is a constant and a ratio between voltage and current, would light bulbs follow Ohm's law? Yes/ No Explain your answer

Multiple Choice

Why do you need low resistance in wires?

• high resistance creates heat and can cause fire

• energy loss is minimal

• can be used for low voltage and current

• all of these

Multiple Choice

From a power plant to city transmission of electricity, due to the distance the resistance will be very high and you would loose a lot of energy, how would you reduce the power needed?

• decrease resistance, increase the surface area of the wires, thicker diameters or combining smaller wires to make a bundle of wire.

• increasing the voltage at low current

• use air as an insulation and keeps it cool

• all of these

​Success Criteria

​CIE Syllabus 0625 2022

1. ​Differentiate between negative and positive charges.

2. Explain static electricity in terms of gaining or losing electrons

3. ​Distinguish between electrical conductors and insulators

4. Describe electrical fields

5. State the difference about electric current, resistance and voltage

6. Describe an experiment to determine resistance using ammeters and voltmeters

7. State how the resistance of a w​ire relates to its length and diameter

8. Calculate that energy is transferred from the power source to the circuit of the components.

9. Calculate resitance, electrical power and energy​

CUP Textbook pages​ 294 - 304

Open Ended

What is the importance of this topic to your daily or future lives?

Open Ended

Do you have any questions or need for clarifications? (PM or see me during break)