"Electric Magnetism" Electromagnetic Phenomenon PPT Courseware 2

"Electric Magnetism" Electromagnetic Phenomenon PPT Courseware 2

practice

1. An iron block is hung under the spring dynamometer. When the spring dynamometer is moved from N to S, the image of the spring dynamometer's indication changing with the position is:

2. There are two rods a and b with the same shape. If you hold a with your hand as shown in picture A, b will not fall; if you follow picture B, if you hold b with your hand as shown in picture B, a cannot be sucked. This means ( )

A. a is magnetic, b is not magnetic B. a is not magnetic, b is magnetic

C. Neither a nor b are magnetic D. Both a and b are magnetic

3. There are two pins sucked up by one end of the magnet and suspended below the magnet. Among the four pictures shown in the figure, the one that correctly reflects the actual situation is ( )

4. Cut the bar magnet into two sections from the middle, then when the two sections are closer together, they will be ______; after cutting off the circular magnet on the speaker as shown in the figure, let the original parts face each other, and the two halves of the magnets will be ______ (Select "mutually attracted" or "mutually exclusive" or "no interaction").

Phenomenon and conclusion

When power is applied, the small magnetic needle _____ deflects (fill in yes or no);

When the power is turned off, the small compass needle returns to the direction of the north compass;

illustrate:____________________.

The direction of the energizing current is opposite, and the small magnetic needle deflects in the direction of _____.

illustrate:____________________.

1. Magnetic effect of electric current

1. Experiment name: Oersted’s experiment

2. There are ______ around energized wires.

3. Magnetic effect of current:

There is a magnetic field related to ______ around a current-carrying wire

Wang Gang uses the device as shown in the picture to study the relationship between electricity and magnetism. Please carefully observe the device, operations and phenomena in the picture, and then draw preliminary conclusions.

Comparing A and B, we can see that there is a magnetic field around the current-carrying conductor

Comparing A and C, we can see that the direction of the magnetic field of a current-carrying conductor is related to the direction of the current.

2. Magnetic field of energized solenoid

1. There is a magnetic field around the energized solenoid;

2. An energized solenoid is equivalent to a bar magnet.

3. The polarity of both ends of the energized solenoid is related to the direction of the current.

4. The magnetic strength of the energized solenoid depends on the size of the current.

3. Ampere’s 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.

Summary

1. Oersted's experiment showed that there is a magnetic field around a current-carrying conductor, and the direction of the magnetic field is related to the direction of the current.

2. There are ______ around the energized solenoid,

The distribution of magnetic field lines around an energized solenoid is similar to ________.

3. The polarity of the energized solenoid is related to __________,

The relationship between them can be determined by _____________.

4. Ampere’s rule:

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

Class exercises

1. Mark the N and S poles of the energized solenoid in the figure below.

2. Based on the deflection of the small magnetic needle, mark the direction of the current in the solenoid.

3. According to the direction of the pointer when the small magnetic needle is stationary, determine the positive and negative poles of the power supply.

4. The picture below shows two small and light energized solenoids. When they are close to each other, they will ( )

5. As shown in the picture, please draw the winding method of the solenoid.

6. When there is current flowing through the electromagnet coil, the small magnetic needle rests at the position as shown in the figure, then the A terminal of the power supply is the ____ pole.

Keywords: electromagnetic phenomenon teaching courseware, electromagnetic teaching courseware, Shandong Education Edition ninth grade physics PPT courseware download, ninth grade physics slide courseware download, electromagnetic phenomenon PPT courseware download, electromagnetic PPT courseware download, .PPT format ;

For more information about the PPT courseware "Electromagnetism and Electromagnetic Phenomenon", please click on the Electromagnetic Phenomenon ppt tab.

"Electric Magnetism" PPT:

"Electric Magnetism" PPT Part One Content: Oersted's Experiment In 1820, Danish physicist Oersted finally experimentally confirmed the existence of a magnetic field around an energized conductor. This major discovery shocked the scientific community and brought electromagnetism into a new era. period of development. The magnetic field of the current...

"Electric Magnetism" Electromagnetic Phenomenon PPT Courseware 3:

"Electric Magnetism" Electromagnetic Phenomenon PPT Courseware 3 Conjecture: The connection between electricity and magnetism. What are the similarities between charged bodies and magnets? A charged object has two kinds of charges, and a magnet has two magnetic poles. The same kind (same name) repels each other, and different kinds (different names) attract each other. Demo 1 (1)..

"Electric Magnetism" electromagnetic phenomenon PPT courseware:

"Electric Magnetism" Electromagnetic Phenomenon PPT Courseware (1) Will the magnetic needle rotate? As shown in the picture on the right, place a magnetic needle under a straight wire, make the wire contact the battery, connect the circuit, and observe the changes of the small magnetic needle. The magnetic needle rotates. (2) What does the rotation of the magnetic needle mean...