"Magnetic Force of Electromagnets (2)" Energy PPT Courseware

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"Magnetic Force of Electromagnets (2)" Energy PPT Courseware

Experimental changing conditions:

1. Change the number of battery cells (change the current intensity)

2. Change the length of the iron core

3. Change the thickness of the iron core

Our joint research results

The magnetic force of the electromagnet is related to the number of coil turns, the number of batteries, the thickness of the iron core, the length of the iron core, the thickness of the wire, the shape of the coil, the shape of the iron core, and the type of wire.

As the number of coil turns increases, the magnetism increases; as the number of batteries increases, the magnetism increases.

judge

1. The more pins the electromagnet attracts, the greater the magnetic force. ( )

2. With the same number of batteries, the more electromagnet coils, the smaller the magnetic force. ( )

3. When studying the relationship between magnetism and the number of coil turns, the number of batteries used should be the same. ( )

4. The magnetic force of the electromagnet may be changed. ( )

5. When conducting experiments to study the magnetic force of electromagnets, do not turn on the electromagnet for a long time. This will consume too much battery power and affect the accuracy of the experiment. ( )

1. Which of the following cannot change the magnetic force of the electromagnet ( ).

A. Increase the number of battery cells B. Change the coil winding direction C. Increase the number of coil winding turns

2. When studying the relationship between the magnetic force of the electromagnet and the number of batteries, what should remain unchanged is ( ).

A. Number of coils, number of batteries B. Number of coils, size of iron core

C. The number of batteries and the size of the iron core

3. When studying the relationship between the magnetic force of the electromagnet and the number of batteries, the conditions to be changed are ( ).

A. The number of batteries B. The number of coils C. The size of the iron core

4. Only change the winding direction of the electromagnet coil, electromagnet ( ).

A. The North and South Pole changes B. The South and North Pole remains unchanged C. The strength of the magnetic force changes

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Update Time: 2024-09-26

This template belongs to science courseware Science Edition for Sixth Grade Science Volume 1 industry PPT template

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