Greek Gymnasium Grade 3 / Physics / Curriculum

Ηλεκτρική δύναμη και φορτίο

Ηλεκτρική δύναμη και φορτίο: structured theory, worked examples, answered practice, and a mastery checklist for Greek Gymnasium Grade 3.

学习目标

Describe “Ηλεκτρική δύναμη” using evidence from observation, measurement, or a model.
Describe “Ηλεκτρικό φορτίο” using evidence from observation, measurement, or a model.
Describe “Ηλεκτρικό φορτίο στο εσωτερικό του ατόμου” using evidence from observation, measurement, or a model.
Describe “Ηλέκτριση με τριβή, επαφή και επαγωγή” using evidence from observation, measurement, or a model.
Describe “Νόμος Coulomb σε ποιοτικό/βασικό επίπεδο” using evidence from observation, measurement, or a model.

核心概念与检查

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

单元

核心理论

练习前按清晰顺序掌握本章核心概念。

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.

Ηλεκτρική δύναμη

For “Ηλεκτρική δύναμη”, 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.

Ηλεκτρικό φορτίο

For “Ηλεκτρικό φορτίο”, 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.

Ηλεκτρικό φορτίο στο εσωτερικό του ατόμου

For “Ηλεκτρικό φορτίο στο εσωτερικό του ατόμου”, 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.

Ηλέκτριση με τριβή, επαφή και επαγωγή

For “Ηλέκτριση με τριβή, επαφή και επαγωγή”, 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.

Νόμος Coulomb σε ποιοτικό/βασικό επίπεδο

For “Νόμος Coulomb σε ποιοτικό/βασικό επίπεδο”, 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

例题讲解

逐步查看方法，并理解每一步为何成立。

Worked enquiry example

In a safe test about “Ηλεκτρική δύναμη”, the first condition gives 10 units and the second 7. Which is greater, and what should be kept the same?

1Compare the two measurements.
2State the changed factor and the conditions that must stay the same.
3Write a conclusion supported only by the data.

The first value is greater by 3 units. A fair test changes only one factor.

Thinking and explanation example

Explain “Ηλεκτρική δύναμη” in your own words and use a picture, objects, a table, or a simple measurement to support it.

1State what is known and what is being found.
2Choose one clear representation.
3Explain what it shows and check that the answer is sensible.

A complete explanation connects the correct idea, a clear representation, and a sensible check.

Ηλεκτρική δύναμη και φορτίο

含答案练习

八道分层练习，从基础熟练到考试应用。请先独立完成，再查看提示或答案。

基础熟练3 分钟

Record 5 safe observations about “Ηλεκτρική δύναμη” without writing a conclusion yet.

提示

An observation is something seen, heard, or measured.

答案指南

The response needs 5 specific observable or measurable statements, not guesses about cause.

基础熟练4 分钟

Design a fair test for “Ηλεκτρικό φορτίο”: what changes, what is measured, and which 6 things stay the same?

提示

Change one factor only.

答案指南

Full response: one changed factor, one measurable outcome, and 6 controlled conditions.

应用4 分钟

Measurements are 4, 3, and 7 units. Put them in a table, find the greatest, and the difference from the least.

提示

Use condition and measurement headings.

答案指南

Greatest 7, least 3, difference 4 units.

应用5 分钟

Sort examples of “Ηλέκτριση με τριβή, επαφή και επαγωγή” into two groups and state the sorting rule.

提示

Each item should clearly match one group.

答案指南

A full response gives two named groups, at least two examples in each, and an observable sorting rule.

推理5 分钟

Choose a suitable tool and unit to measure something connected with “Νόμος Coulomb σε ποιοτικό/βασικό επίπεδο”.

提示

Decide whether you measure length, time, mass, temperature, or volume.

答案指南

The quantity, instrument, and unit must match, e.g. time-stopwatch-s or length-ruler-cm.

推理6 分钟

From data 6, 10, 14, predict the next value and explain the pattern.

提示

Look for the constant change +4.

答案指南

18; +4.

考试题型7 分钟

Write 6 safety rules for a simple activity about “Ηλεκτρική δύναμη” and explain the risk each reduces.

提示

Link each rule to a reason.

答案指南

A full response gives 6 specific rules, each linked to a risk, and requires supervision where appropriate.

考试题型8 分钟

Data A=5 and B=8. Write a conclusion, evidence, and one limitation about “Ηλεκτρικό φορτίο”.

提示

Do not claim more than the two values show.

答案指南

B is 3 greater than A. The values support this, but two measurements alone do not prove a general rule.

常见错误

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.

掌握度检查

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

Ηλεκτρική δύναμη και φορτίο

章节作业

六道不同作业，从基础到挑战，包含预计用时、提示和答案指南。

基础5 分钟

Homework 1: Record 8 safe observations about “Ηλεκτρική δύναμη” without writing a conclusion yet.

提示

An observation is something seen, heard, or measured.

答案指南

The response needs 8 specific observable or measurable statements, not guesses about cause.

基础6 分钟

Homework 2: Design a fair test for “Ηλεκτρικό φορτίο”: what changes, what is measured, and which 2 things stay the same?

提示

Change one factor only.

答案指南

Full response: one changed factor, one measurable outcome, and 2 controlled conditions.

进阶7 分钟

Homework 3: Measurements are 7, 4, and 11 units. Put them in a table, find the greatest, and the difference from the least.

提示

Use condition and measurement headings.

答案指南

Greatest 11, least 4, difference 7 units.

进阶8 分钟

Homework 4: Sort examples of “Ηλέκτριση με τριβή, επαφή και επαγωγή” into two groups and state the sorting rule.

提示

Each item should clearly match one group.

答案指南

A full response gives two named groups, at least two examples in each, and an observable sorting rule.

挑战10 分钟

Homework 5: Choose a suitable tool and unit to measure something connected with “Νόμος Coulomb σε ποιοτικό/βασικό επίπεδο”.

提示

Decide whether you measure length, time, mass, temperature, or volume.

答案指南

The quantity, instrument, and unit must match, e.g. time-stopwatch-s or length-ruler-cm.

挑战12 分钟

Homework 6: From data 9, 14, 19, predict the next value and explain the pattern.

提示

Look for the constant change +5.

答案指南

24; +5.

35 分钟 / 30 分

完整章节测试

带计时器、完整分值和参考答案的章节自测。

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

1. Record 6 safe observations about “Ηλεκτρική δύναμη” without writing a conclusion yet.

2 分

答案指南

The response needs 6 specific observable or measurable statements, not guesses about cause.

2. Design a fair test for “Ηλεκτρικό φορτίο”: what changes, what is measured, and which 2 things stay the same?

3 分

答案指南

Full response: one changed factor, one measurable outcome, and 2 controlled conditions.

3. Measurements are 5, 4, and 9 units. Put them in a table, find the greatest, and the difference from the least.

3 分

答案指南

Greatest 9, least 4, difference 5 units.

4. Sort examples of “Ηλέκτριση με τριβή, επαφή και επαγωγή” into two groups and state the sorting rule.

4 分

答案指南

A full response gives two named groups, at least two examples in each, and an observable sorting rule.

5. Choose a suitable tool and unit to measure something connected with “Νόμος Coulomb σε ποιοτικό/βασικό επίπεδο”.

4 分

答案指南

The quantity, instrument, and unit must match, e.g. time-stopwatch-s or length-ruler-cm.

6. From data 7, 12, 17, predict the next value and explain the pattern.

4 分

答案指南

22; +5.

7. Write 2 safety rules for a simple activity about “Ηλεκτρική δύναμη” and explain the risk each reduces.

5 分

答案指南

A full response gives 2 specific rules, each linked to a risk, and requires supervision where appropriate.

8. Data A=6 and B=10. Write a conclusion, evidence, and one limitation about “Ηλεκτρικό φορτίο”.

5 分

答案指南

B is 4 greater than A. The values support this, but two measurements alone do not prove a general rule.

单元

官方来源与核验

课程参考来源；教学顺序请始终与学校和老师确认。

Ινστιτούτο Εκπαιδευτικής Πολιτικής (ΙΕΠ)Official curriculum programmes and announcements.Ψηφιακό Σχολείο / Διαδραστικά Σχολικά ΒιβλίαOfficial school textbooks and available digital material.

Physics

Greek Gymnasium Grade 3: 数学与物理的结构化路线，包含章节、练习和下一步。

返回科目

本章覆盖内容

结构跟随教材，用来帮助组织学习。

Ηλεκτρική δύναμη

Ηλεκτρικό φορτίο

Ηλεκτρικό φορτίο στο εσωτερικό του ατόμου

Ηλέκτριση με τριβή, επαφή και επαγωγή

Νόμος Coulomb σε ποιοτικό/βασικό επίπεδο

Ηλεκτρικό πεδίο σε βασικό επίπεδο

重点关注

通常容易出错或需要更多复习的部分。

I draw and analyse a circuit with correct instruments.

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

I interpret fields and induction with direction.

来源、日常资料与学习资源

从教材、daily material、PDFs、videos 和 worked examples 开始。

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.

按小主题练习

进入 full tests 前先做 targeted practice，让覆盖情况更清楚。