"Magnetic Force of Electromagnets (1)" Energy PPT Courseware 2

Description

"Magnetic Force of Electromagnets (1)" Energy PPT Courseware 2

fill in the blank:

1. The device composed of a coil and an iron core is called ________. It produces ________ when it is powered on and disappears when the power is turned off.

2. Electromagnets also have north and south poles. The north and south poles of electromagnets are related to ______________ and ______________.

Experimental conclusion (what we found)

The magnetic force of an electromagnet is related to the number of coil turns. The greater the number of coil turns, the greater the magnetic force. The smaller the number of coil turns, the smaller the magnetic force.

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. Which of the following cannot change the magnetic pole of the electromagnet ( ).

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

3. Only change the direction of the electromagnet current, electromagnet ( ).

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

4. Xiao Ming first changes the winding direction of the electromagnet coil, and then changes the current direction of the electromagnet. At this time, the electromagnet is ( ).

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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For more information about the PPT courseware "Magnetic Force of Energy Electromagnets", please click on the Magnetic Force of Energy ppt Electromagnets ppt tab.

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Update Time: 2024-11-18

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

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