"Magnetic Field of Electric Current" Magnetic Phenomenon PPT Courseware 2

Description

"Magnetic Field of Electric Current" Magnetic Phenomenon PPT Courseware 2

right-hand spiral rule

An energized solenoid is equivalent to a bar magnet, and the relationship between its polarity and current direction conforms to: the right-hand spiral rule

Hold the solenoid with your right hand and bend your four fingers in the direction of the solenoid current. The end pointed by your thumb is the north pole of the solenoid.

The right-hand spiral rule can solve the following problems:

(1) Given the current direction, determine the N and S poles.

(2) Given the N and S poles of the small magnetic needle, determine the N and S poles of the energized solenoid, the direction of the magnetic field lines and the direction of the current.

(3) Give the current direction and the N and S poles of the solenoid, and draw the winding method of the solenoid.

Class summary

1. What knowledge have you learned through studying this lesson?

2. In this lesson we learned a method of understanding things called the ________ method.

3. Have you actively participated in class learning? Have you actively raised and thought about questions? Have you actively participated in group discussions and exchanges? Are you satisfied with your performance?

On-site inspection:

1. As shown in the figure below, the small magnetic needle is in a stationary state, then a is the ______ pole of the power supply, and d is the _______ pole of the solenoid.

2. Please mark in the picture above:

(1) The magnetic poles at the A end of the energized solenoid and the B end of the permanent magnet.

(2) Direction of magnetic field lines

3. In 1820, Ampere conducted a small experiment at a regular meeting of the Academy of Sciences, which aroused the interest of scientists. As shown below, the solenoid was hung horizontally in the east-west direction, and then the wires were energized. Please think about what will happen. The phenomenon is ( )

A. The energized solenoid remains stationary in its original position.

B. The energized solenoid rotates until A points to the direction and B points to the north.

C. The energized solenoid rotates until A points to north and B points to direction.

D. The energized solenoid is at rest at any position.

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For more information about the PPT courseware "Magnetic Phenomena and Current's Magnetic Field", please click on the Magnetic Phenomena ppt Current's Magnetic Field ppt tag.

"Magnetic Field of Current" From Compass to Maglev Train PPT Courseware 4:

"Magnetic Field of Current" From Compass to Maglev Train PPT Courseware 4

New knowledge exploration

1. Electromagnet

Definition: An energized solenoid inserted into an iron core is called an electromagnet.

Working principle: Use the magnetic effect of electric current to work.

So the magnetic size of the electromagnet is related to...

"Magnetic Field of Current" From Compass to Maglev Train PPT Courseware 3:

"Magnetic Field of Current" From Compass to Maglev Train PPT Courseware 3

Situation introduction

Are magnetism and electricity related?

magnet charged body

Can attract magnetic substances and attract light and small objects

There are North and South poles..

"Magnetic Field of Current" From Compass to Maglev Train PPT Courseware 2:

"Magnetic Field of Current" From Compass to Maglev Train PPT Courseware 2

Review: What is observed when a small magnetic needle is placed around a bar magnet? What is the reason?

The small magnetic needle is observed to deflect.

Reason: Because there are magnetic fields around the magnet...

File Info

Update Time: 2024-07-09

This template belongs to Physics courseware Beijing Normal University Ninth Grade Physics Volume 2 industry PPT template

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