KS3 Year 9 / Physics / Curriculum

Electricity and magnetism

Electricity and magnetism: structured theory, worked examples, answered practice, and a mastery checklist for KS3 Year 9.

Цели обучения

Describe “Current, potential difference and resistance” using evidence from observation, measurement, or a model.
Describe “Series and parallel circuits” using evidence from observation, measurement, or a model.
Describe “I-V characteristics introduction” using evidence from observation, measurement, or a model.
Describe “Static electricity” using evidence from observation, measurement, or a model.
Describe “Electric fields in simple form” using evidence from observation, measurement, or a model.

Ключевые идеи и проверки

I draw and analyse a circuit with correct instruments.
I connect charge, current, voltage, resistance, and power.
Every solution or explanation for “Electricity and magnetism” should include a method, justification, and final check.

Раздел

Основная теория

Ключевые идеи главы в понятной последовательности перед практикой.

Charge, current, and potential difference

Charge is a property, current is charge flow rate, and potential difference is energy per unit charge. Keep these definitions distinct.

Circuit and conservation

Draw a closed circuit with correct symbols. Apply charge conservation at junctions and energy conservation around loops where required.

Fields and induction

Field lines indicate direction and relative strength. In induction, changing magnetic flux is linked to induced potential difference.

Current, potential difference and resistance

For “Current, potential difference and resistance”, start from an observation or model, define quantities and units where relevant, and separate the changed factor from the measured outcome. Support the conclusion with data and state the test's limitations.

Series and parallel circuits

For “Series and parallel circuits”, start from an observation or model, define quantities and units where relevant, and separate the changed factor from the measured outcome. Support the conclusion with data and state the test's limitations.

I-V characteristics introduction

For “I-V characteristics introduction”, start from an observation or model, define quantities and units where relevant, and separate the changed factor from the measured outcome. Support the conclusion with data and state the test's limitations.

Static electricity

For “Static electricity”, start from an observation or model, define quantities and units where relevant, and separate the changed factor from the measured outcome. Support the conclusion with data and state the test's limitations.

Electric fields in simple form

For “Electric fields in simple form”, start from an observation or model, define quantities and units where relevant, and separate the changed factor from the measured outcome. Support the conclusion with data and state the test's limitations.

Physics

Разобранные примеры

Следуйте методу шаг за шагом и проверяйте обоснование каждого шага.

Worked circuit example

A 7 Ω resistor is connected across 35 V. Find current and power.

1Ohm's law: I = V/R = 35/7.
2Power: P = VI = 35 · 5.
3Check A and W units and that the circuit is closed.

I = 5 A, P = 175 W

Reasoning example

Before calculating, explain the key idea from “Current, potential difference and resistance” and which conditions must be checked.

1Define the idea in one clear sentence.
2Connect it to a representation, law, or formula.
3State a restriction, unit, or final check that makes the solution valid.

The answer should show not only which rule is used for “Current, potential difference and resistance”, but also why it is valid here.

Electricity and magnetism

Практика с ответами

Восемь заданий от базовых навыков до экзаменационного уровня. Сначала решите самостоятельно.

Базовый навык4 минут

A 6 Ω resistor carries 5 A. Find voltage and power.

Подсказка

V=IR and P=VI.

Ответ

V=30 V, P=150 W.

Базовый навык5 минут

Structure a solution for “Series and parallel circuits”: givens, SI units, law, substitution, and interpretation.

Подсказка

State the law before substituting numbers.

Ответ

A full solution states symbols/units, selects a valid law for “Series and parallel circuits”, shows substitution and calculation, and interprets the result.

Применение6 минут

Identify three uncertainty sources in measuring “I-V characteristics introduction” and improve each one.

Подсказка

Consider instrument resolution, reaction time, repeats, and controls.

Ответ

A full response links each specific error source to a targeted improvement and identifies random or systematic impact.

Применение7 минут

Plan a suitable graph for “Static electricity” data and explain how to obtain a gradient or relationship.

Подсказка

Put the independent variable on x and dependent variable on y.

Ответ

A full response labels axes/units, uses a suitable scale and best fit; gradient uses a large triangle and is interpreted with units.

Обоснование8 минут

Check whether a result for “Electric fields in simple form” is sensible using units, order of magnitude, and a limiting case.

Подсказка

A check should not merely repeat the same calculation.

Ответ

A full check confirms dimensions/units, compares expected magnitude, and tests behaviour when one variable becomes very small or large.

Обоснование9 минут

Connect “Electromagnets” to energy conservation or a force/field model and justify the choice.

Подсказка

Define the system and interactions.

Ответ

A full response defines the system, describes transfer or interaction, applies the appropriate model, and states losses or limitations.

Экзаменационный10 минут

Write a multi-step exam response about “Motor effect introduction” with calculation and evaluation.

Подсказка

Separate givens, model, calculation, result, and evaluation.

Ответ

A full response includes an appropriate diagram/model, laws, algebraic rearrangement, SI substitution, suitably precise result, and evaluation of assumptions.

Экзаменационный12 минут

Compare two methods for investigating “Generator effect introduction” and select the more reliable using criteria.

Подсказка

Use accuracy, repeatability, control, and safety.

Ответ

The choice must use at least three comparable criteria and acknowledge one trade-off or limitation.

Частые ошибки

Connecting an ammeter in parallel or a voltmeter in series.
Confusing current with voltage or saying current is consumed.
Ignoring direction in force, field, or induction.

Проверка понимания

I draw and analyse a circuit with correct instruments.
I connect charge, current, voltage, resistance, and power.
I interpret fields and induction with direction.

Electricity and magnetism

Домашняя работа по главе

Шесть разных заданий от базового уровня до сложного с временем, подсказками и ответами.

Базовый8 минут

Homework 1: A 2 Ω resistor carries 8 A. Find voltage and power.

Подсказка

V=IR and P=VI.

Ответ

V=16 V, P=128 W.

Базовый10 минут

Homework 2: Structure a solution for “Series and parallel circuits”: givens, SI units, law, substitution, and interpretation.

Подсказка

State the law before substituting numbers.

Ответ

A full solution states symbols/units, selects a valid law for “Series and parallel circuits”, shows substitution and calculation, and interprets the result.

Углубленный12 минут

Homework 3: Identify three uncertainty sources in measuring “I-V characteristics introduction” and improve each one.

Подсказка

Consider instrument resolution, reaction time, repeats, and controls.

Ответ

A full response links each specific error source to a targeted improvement and identifies random or systematic impact.

Углубленный15 минут

Homework 4: Plan a suitable graph for “Static electricity” data and explain how to obtain a gradient or relationship.

Подсказка

Put the independent variable on x and dependent variable on y.

Ответ

A full response labels axes/units, uses a suitable scale and best fit; gradient uses a large triangle and is interpreted with units.

Сложный18 минут

Homework 5: Check whether a result for “Electric fields in simple form” is sensible using units, order of magnitude, and a limiting case.

Подсказка

A check should not merely repeat the same calculation.

Ответ

A full check confirms dimensions/units, compares expected magnitude, and tests behaviour when one variable becomes very small or large.

Сложный20 минут

Homework 6: Connect “Electromagnets” to energy conservation or a force/field model and justify the choice.

Подсказка

Define the system and interactions.

Ответ

A full response defines the system, describes transfer or interaction, applies the appropriate model, and states losses or limitations.

50 минут / 40 баллов

Полный тест по главе

Полный тест с таймером, баллами и образцами ответов.

Start the timer when ready, work without notes, show every step, and open model answers only after finishing.

1. A 2 Ω resistor carries 6 A. Find voltage and power.

2 баллов

Ответ

V=12 V, P=72 W.

2. Structure a solution for “Series and parallel circuits”: givens, SI units, law, substitution, and interpretation.

3 баллов

Ответ

A full solution states symbols/units, selects a valid law for “Series and parallel circuits”, shows substitution and calculation, and interprets the result.

3. Identify three uncertainty sources in measuring “I-V characteristics introduction” and improve each one.

3 баллов

Ответ

A full response links each specific error source to a targeted improvement and identifies random or systematic impact.

4. Plan a suitable graph for “Static electricity” data and explain how to obtain a gradient or relationship.

4 баллов

Ответ

A full response labels axes/units, uses a suitable scale and best fit; gradient uses a large triangle and is interpreted with units.

5. Check whether a result for “Electric fields in simple form” is sensible using units, order of magnitude, and a limiting case.

4 баллов

Ответ

A full check confirms dimensions/units, compares expected magnitude, and tests behaviour when one variable becomes very small or large.

6. Connect “Electromagnets” to energy conservation or a force/field model and justify the choice.

4 баллов

Ответ

A full response defines the system, describes transfer or interaction, applies the appropriate model, and states losses or limitations.

7. Write a multi-step exam response about “Motor effect introduction” with calculation and evaluation.

5 баллов

Ответ

A full response includes an appropriate diagram/model, laws, algebraic rearrangement, SI substitution, suitably precise result, and evaluation of assumptions.

8. Compare two methods for investigating “Generator effect introduction” and select the more reliable using criteria.

5 баллов

Ответ

The choice must use at least three comparable criteria and acknowledge one trade-off or limitation.

9. Create an extension question about “Current, potential difference and resistance”, a prediction, and a data-collection plan.

5 баллов

Ответ

A full response gives a testable question, justified prediction, independent-variable range, repeats, and an analysis method.

10. A 5 Ω resistor carries 5 A. Find voltage and power.

5 баллов

Ответ

V=25 V, P=125 W.

Раздел

Официальные источники

Источники программы; порядок тем уточняйте в школе и у преподавателя.

UK Department for Education - ScienceOfficial national curriculum progression and attainment guidance.

Physics

KS3 Year 9: структурированный маршрут по математике и физике с главами, практикой и следующими шагами.

Назад к предмету

Что покрывает глава

Структура следует учебнику и помогает организовать изучение темы.

Current, potential difference and resistance

Series and parallel circuits

I-V characteristics introduction

Static electricity

Electric fields in simple form

Electromagnets

Motor effect introduction

Generator effect introduction

Где сфокусироваться

Темы, где чаще возникают ошибки или нужна дополнительная практика.

I draw and analyse a circuit with correct instruments.

I connect charge, current, voltage, resistance, and power.

I interpret fields and induction with direction.

Источники, ежедневные материалы и ресурсы

С чего начать: учебник, daily material, PDFs, videos и worked examples.

Start from the official textbook or specification referenced on the subject page.

Use the notes and examples as support, not as a replacement for the official syllabus.

Check the current syllabus version before exam preparation.

Практика по подтемам

Целевая практика перед full tests, чтобы coverage было понятным.

A 6 Ω resistor carries 5 A. Find voltage and power.

Structure a solution for “Series and parallel circuits”: givens, SI units, law, substitution, and interpretation.

Identify three uncertainty sources in measuring “I-V characteristics introduction” and improve each one.

Plan a suitable graph for “Static electricity” data and explain how to obtain a gradient or relationship.

Check whether a result for “Electric fields in simple form” is sensible using units, order of magnitude, and a limiting case.

Connect “Electromagnets” to energy conservation or a force/field model and justify the choice.

Write a multi-step exam response about “Motor effect introduction” with calculation and evaluation.

Compare two methods for investigating “Generator effect introduction” and select the more reliable using criteria.

Mocks и проверка прогресса

Как измерять прогресс по главе и когда включать ее в общий mock.

Start with untimed practice by subtopic.

Move to a short timed checkpoint only after completing the mastery checklist.

Record each error with the correct method and revisit it after 48 hours.

Следующий шаг

Что делать после главы и как она связана со следующим разделом.

Complete the practice without support.

Explain the core method aloud in under two minutes.

Continue to the next chapter or request targeted tutor support.

Примечание: официальную экзаменационную программу каждого года всегда уточняйте в школе, у преподавателя и по текущим официальным источникам.

Цели обучения

Describe “Current, potential difference and resistance” using evidence from observation, measurement, or a model.

Describe “Series and parallel circuits” using evidence from observation, measurement, or a model.

Describe “I-V characteristics introduction” using evidence from observation, measurement, or a model.

Describe “Static electricity” using evidence from observation, measurement, or a model.

Describe “Electric fields in simple form” using evidence from observation, measurement, or a model.

Что покрывает глава

Структура следует учебнику и помогает организовать изучение темы.

Current, potential difference and resistance

Series and parallel circuits

I-V characteristics introduction

Static electricity

Electric fields in simple form

Electromagnets

Motor effect introduction

Generator effect introduction

Источники, ежедневные материалы и ресурсы

С чего начать: учебник, daily material, PDFs, videos и worked examples.

Start from the official textbook or specification referenced on the subject page.

Use the notes and examples as support, not as a replacement for the official syllabus.

Check the current syllabus version before exam preparation.

Практика по подтемам

Целевая практика перед full tests, чтобы coverage было понятным.

A 6 Ω resistor carries 5 A. Find voltage and power.

Structure a solution for “Series and parallel circuits”: givens, SI units, law, substitution, and interpretation.

Identify three uncertainty sources in measuring “I-V characteristics introduction” and improve each one.

Plan a suitable graph for “Static electricity” data and explain how to obtain a gradient or relationship.

Check whether a result for “Electric fields in simple form” is sensible using units, order of magnitude, and a limiting case.

Connect “Electromagnets” to energy conservation or a force/field model and justify the choice.

Write a multi-step exam response about “Motor effect introduction” with calculation and evaluation.

Compare two methods for investigating “Generator effect introduction” and select the more reliable using criteria.

Mocks и проверка прогресса

Как измерять прогресс по главе и когда включать ее в общий mock.

Start with untimed practice by subtopic.

Move to a short timed checkpoint only after completing the mastery checklist.

Record each error with the correct method and revisit it after 48 hours.