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Authoritative PPT Summary
"What's wrong with the circuit" PPT courseware
Review questions:
1. Name the following circuit components
Using the materials provided as raw materials, work in groups to connect the circuit below.
The current flows from one end of the battery through the wire, passes through the small bulb, and returns to the other end of the battery, forming a complete loop, and the small bulb will glow.
Why don't the little light bulbs of some groups turn on?
What's wrong with the circuit that makes the lightbulb not light up?
Make a circuit detector
Production Method:
Remove the switch from the circuit that lights up the light bulb, as shown in the picture, and the "circuit detector" is complete.
--Can be used to detect faults in circuits.
Notice:
① After making it, be sure to test whether the small light bulb lights up;
② Pay attention to safety and do not use it to detect human bodies or 220V circuits.
Detect the wire: Use the two detection heads of the circuit detector to connect the two ends of a wire. If the small bulb lights up, it means that the wire is not faulty; if the small bulb does not light up, it means that the wire is faulty.
Detect the light bulb: Use the two detection heads of the circuit detector to connect the two connection points of the light bulb. If the small light bulb lights up, it means that the light bulb is not faulty; if the small light bulb does not light up, it means that the light bulb is faulty.
Test the battery: Take out the battery from the battery box of the circuit detector, put the battery in the faulty circuit into the battery box of the circuit detector, and see if the small light bulb lights up. If the small light bulb lights up, it means that the battery is still there. If the small light bulb does not light up, it means that the battery is out of power.
Class summary:
What new gains have you gained from today’s study?
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"What's wrong with the circuit" PPT courseware 2:
"What's wrong with the circuit" PPT courseware 2 Commonly used methods: Replacement method: Use another light bulb, battery, wire, etc. to replace the materials in the circuit and see if the light bulb can light up. Inspection method: Check whether the connections in the circuit are intact. Use a detector to check whether the circuit...