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"Electricity and Magnetism" Energy PPT Courseware 2
In 1820, the Danish scientist Oersted accidentally brought a current-carrying wire close to a compass during an experiment, and discovered a strange phenomenon. What phenomenon did he discover?
friendly reminder
(1) Hold the wire with both hands and straighten it against the compass in the same direction as the magnetic needle.
(2) After the compass comes to rest, close the switch and turn on the current. Observe whether there is any change in the compass? Turn off the switch to cut off the current and observe what happens to the compass?
(3) Repeat it several times, and what is the result?
Circuit short circuit experiment
Tip: If the circuit is short-circuited and the current is very strong, the battery will heat up quickly. So it can only be connected once and disconnected immediately, and the time cannot be long.
Circuit short circuit experiment
hint:
(1) Remove the small bulb and lamp holder, but keep the switch;
(2) Everything is ready, power on, and the switch can be released with one touch.
friendly reminder
Replace a wire in a circuit with a coil
(1) The coil and the magnetic needle are in the same direction. Compared with a coil or a wire, which one causes the magnetic needle to deflect at a greater angle?
(2) The coil can be placed flat or vertically. The magnetic needle can be placed inside the coil, or placed in front, back, left, right, etc., and the direction of deflection of the magnetic needle can be observed and recorded. Which method will deflect the magnetic needle at the largest angle?
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For more information about the "Energy Electricity and Magnetism" PPT courseware, please click the Energy ppt Electricity and Magnetism ppt tab.
"Electricity and Magnetism" Energy PPT teaching courseware:
"Electricity and Magnetism" Energy PPT Teaching Courseware Part One: Introduction of New Courses More than 100 years ago, people's understanding of electricity and magnetism was very limited. By chance, Danish scientist Oersted discovered a secret about electricity and magnetism. You want to know this secret...
"Electricity and Magnetism" Energy PPT download:
"Electricity and Magnetism" Energy PPT download Part One: Introduction of new lessons Oersted, full name Hans Christian Oersted (1777.8.141851.3.9), a Danish physicist and chemist. What did he find? In 1820, Oersted accidentally...
"Electricity and Magnetism" Energy PPT:
"Electricity and Magnetism" Energy PPT Part One Content: Electrified Wires and Compass Assemble a circuit that lights up a small light bulb. Try to see if the small light bulb lights up? Recall the path electricity takes in a circuit. Put a compass on the table. After the pointer stops swinging, where will the compass point?