Topicm8476e396b9238a67_1528449000663_0Topic

Magnetic field around the conductor with the current

Levelm8476e396b9238a67_1528449084556_0Level

Second

Core curriculumm8476e396b9238a67_1528449076687_0Core curriculum

VII. Magnetism. The student:

4) uses the concept of magnetic fieldmagnetic fieldmagnetic field; draws magnetic field lines near permanent magnets and conductors with currentcurrentcurrent (rectilinear conductorconductorconductor, coilcoilcoil).

Timingm8476e396b9238a67_1528449068082_0Timing

45 minutes

General learning objectivesm8476e396b9238a67_1528449523725_0General learning objectives

Draws magnetic field lines near conductors with current.

Key competencesm8476e396b9238a67_1528449552113_0Key competences

1. Explains the idea of the Oersted’s experiment.

2. Determines a direction of magnetic field around a current‑carrying wire.

Operational (detailed) goalsm8476e396b9238a67_1528450430307_0Operational (detailed) goals

The student:

- describes the Oersted’s experiment,

- draws magnetic fieldmagnetic fieldmagnetic field lines near conductors with currentcurrentcurrent.

Methodsm8476e396b9238a67_1528449534267_0Methods

1. Discussion.

2. Text analysis.

Forms of workm8476e396b9238a67_1528449514617_0Forms of work

1. Individual work.

2. Group work.

Lesson stages

Introductionm8476e396b9238a67_1528450127855_0Introduction

The students remind what is the shape of the magnetic field lines around the permanent magnet, on the example of a bar or horseshoe magnet.

What is the shape of the magnetic field lines around the bar magnet, and what is it around the horseshoe magnet?

Procedurem8476e396b9238a67_1528446435040_0Procedure

The teacher introduces the Oersted’s experiment and discusses its results with the students.

Oersted’s experiment:

Hans Christian Oersted discovered in 1820 that a compass needle reacts to electric currentcurrentcurrent which flows in nearby of this compass.

Task 1

Watch the slideshow presenting the idea of the Oersted’s experiment.

[Slideshow 1]

Electric current and magnetic fieldmagnetic fieldmagnetic field:

The movement of the magnetic needle near the conductorconductorconductor through which electric current flows indicates the presence of a magnetic field. The direction of the needle's deflectiondeflectiondeflection depends on which direction the current flows.

The magnetic field (B) surrounding a current‑carrying wire can be visualized as a pattern of concentric circular field lines.

Right‑hand rule:

Right‑hand rule determines the direction of the magnetic field around a current‑carrying wire.

Using your right‑hand:

Point your thumb in the direction of the current. Curl your fingers into a half‑circle around the wire and they point in the direction of the magnetic field.m8476e396b9238a67_1527752256679_0Point your thumb in the direction of the current. Curl your fingers into a half‑circle around the wire and they point in the direction of the magnetic field.

[Interactive graphics]

Shape of a conductor vs magnetic field lines:

The pattern of the lines of magnetic fieldmagnetic fieldmagnetic field depends on the shape of the conductor. The direction of the magnetic field depends on the direction of the currentcurrentcurrent flow.

Task 2

Watch the slideshow and understand how a shape of the conductorconductorconductor influences the pattern of magnetic fieldmagnetic fieldmagnetic field.

[Slideshow 2]

Lesson summarym8476e396b9238a67_1528450119332_0Lesson summary

Electric current produces a magnetic field. The pattern of the lines of magnetic field depends on the shape of the conductor. The direction of the magnetic field depends on the direction of the current flow.m8476e396b9238a67_1527752263647_0Electric current produces a magnetic field. The pattern of the lines of magnetic field depends on the shape of the conductor. The direction of the magnetic field depends on the direction of the current flow.

Selected words and expressions used in the lesson plan

coilcoilcoil

conductorconductorconductor

currentcurrentcurrent

deflectiondeflectiondeflection

electric fieldelectric fieldelectric field

influenceinfluenceinfluence

magnetic fieldmagnetic fieldmagnetic field

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magnetic field1
magnetic field

pole magnetyczne

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wymowa w języku angielskim: magnetic field
current1
current

prąd

RxFy0HV40hvmH1
wymowa w języku angielskim: current
conductor1
conductor

przewodnik

R1UTxjrRXZrVH1
wymowa w języku angielskim: conductor
coil1
coil

zwojnica

R99vTuwD4PBTw1
wymowa w języku angielskim: coil
deflection1
deflection

odchylenie

RJkWST4yUMppE1
wymowa w języku angielskim: deflection
electric field1
electric field

pole elektryczne

R1N4HZKFaXce01
wymowa w języku angielskim: electric field
influence1
influence

wpływ

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wymowa w języku angielskim: influence