If a conductor is connected to a circuit and the voltage applied to both ends of the conductor is doubled, the resistance of the conductor and the current passing through it will be () A. The resistance and current remain unchanged. B. the resistance remains unchanged, and the current is twice the original. C. the resistance and current become twice the original. D. the resistance is reduced to half of the original, and the current is four times the original

If a conductor is connected to a circuit and the voltage applied to both ends of the conductor is doubled, the resistance of the conductor and the current passing through it will be () A. The resistance and current remain unchanged. B. the resistance remains unchanged, and the current is twice the original. C. the resistance and current become twice the original. D. the resistance is reduced to half of the original, and the current is four times the original

Because the resistance is a property of the conductor itself, which has nothing to do with the voltage at both ends and the current passing through it, when the voltage at both ends of the conductor increases to twice the original, the resistance of the conductor remains unchanged, so C is incorrect; from I = ur, the current passing through the conductor becomes twice the original, so a is incorrect, and B is correct; when the resistance is reduced to half of the original, the current becomes four times the original, So D is correct. So BD

In a certain circuit, if the voltage at both ends of the conductor is constant, if the resistance of the conductor is increased by 8 Ω, the current will become three fourths of the original; find the resistance of the original circuit

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How to go the current of voltage divider, how to calculate the current on both sides of constant resistance, and is the voltage of voltage divider equal everywhere

Voltage dividing circuit usually refers to series circuit. The current outside the power supply flows from the positive pole of the power supply, through the consumer (or resistance), and then to the negative pole of the power supply. The current through each consumer or resistance is equal. As for whether the voltage in the voltage dividing circuit is equal, it depends on whether the resistance is equal. If each series resistance is equal, the voltage is equal. Otherwise, it is not equal