Question

Как изменится сопротивление проводника, если напряжение на нем увеличить вдвое? (Увеличится, уменьшится, не изменится) T = const A: увеличится в 2 раза, Б: уменьшится в 2 раза, В: Не изменится, Г: Увеличится в 4 раза, Д: уменьшится в 4 раза

Answer 1

I1=10 A

U1=20 B

R1=20B/10A=2OM

I2=10A

U2=40B

R2=40B/10A=4OM

сопротивление увеличится в 2 раза(цифры взяты произвольно)

 

Answer 2

Changes in Resistance of a Conductor with Doubled Voltage

When the voltage across a conductor is doubled, the resistance of the conductor will not change. The resistance of a conductor is determined by its material, length, and cross-sectional area, and it remains constant as long as these factors remain unchanged.

Increasing the voltage across a conductor will result in an increase in the current flowing through it, according to Ohm's Law (V = IR). However, this increase in current is not due to a change in resistance but rather a consequence of the increased driving force provided by the higher voltage.

Therefore, the correct answer is В: Не изменится (will not change).

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