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In the experiment of exploring the relationship between the current through the resistance and the resistance value, the function of sliding rheostat is_____
Change the amount of current in a circuit (or resistor)
If the lower left terminal is connected, when the slide of the sliding rheostat moves to the left, the circuit resistance decreases, the current in the circuit increases, and the voltage of the constant resistance increases
If the lower left terminal is connected and the slide of the sliding rheostat moves to the left, why does the circuit resistance decrease, the current in the circuit increases, the voltage of the constant resistance increases, and the voltage of the sliding rheostat decreases?
I don't see any diagram. Based on your description, I know what kind of circuit you want to talk about
When the slide moves to the left, the length of the access circuit becomes shorter and the resistance decreases
As the resistance of sliding rheostat decreases, the total resistance of the circuit decreases and the current increases
As the current increases, the voltage equals the current times the resistance, and the voltage of the constant resistance increases
When the total voltage of the circuit is constant, the voltage of the sliding rheostat decreases with the increase of the constant resistance voltage
Which two terminals of sliding resistor have constant resistance?
The bottom two and the top two
Reason: the resistance between the above two terminals is almost zero
The resistance between the two terminals below is the maximum resistance of the sliding rheostat
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