The correct statement about conductor resistance is () A. Because the resistance of the conductor indicates the resistance of the conductor to the current, when there is no current in the conductor, the resistance of the conductor is zero. B. the greater the voltage at both ends of the conductor, the greater the current, so the resistance of the conductor decreases with the increase of the voltage. C. the resistance of the conductor is the property of the conductor to block the current, and its size has nothing to do with the voltage and current intensity The greater the voltage at both ends of the conductor, the greater the current, so the resistance of the conductor increases with the increase of voltage

The correct statement about conductor resistance is () A. Because the resistance of the conductor indicates the resistance of the conductor to the current, when there is no current in the conductor, the resistance of the conductor is zero. B. the greater the voltage at both ends of the conductor, the greater the current, so the resistance of the conductor decreases with the increase of the voltage. C. the resistance of the conductor is the property of the conductor to block the current, and its size has nothing to do with the voltage and current intensity The greater the voltage at both ends of the conductor, the greater the current, so the resistance of the conductor increases with the increase of voltage

Resistance is the resistance of conductor to current and a characteristic of conductor itself. Its size is related to the material, length, cross-sectional area and temperature of conductor, but has nothing to do with the voltage at both ends of conductor and the current passing through

Why doesn't the current after passing through the resistance become smaller? Isn't the resistance causing obstruction?
For example, in a series circuit, the current before the resistor is the same as that after the resistor. Is it only in the resistance that the current becomes smaller?

The resistance acts as a hindrance. After the resistance is installed, the switch is closed. The current of the whole circuit decreases or increases as a whole, rather than changes before and after the current flows into the resistance

What are the functions of voltage source and current source in the circuit, and what are their relations with the resistance and voltage in the circuit?

Of course, current source and voltage source act as voltage source and current source-_ -||It is equivalent to no answer, but both of them are constant, that is to say, no matter how the resistance changes in the circuit, the voltage supplied by the voltage source and the current supplied by the current source are the same