Question

В проводнике с сопротивлением 10 Ом возникает ток силой 0,2 A. Сопротивление проводника уменьшили в 4 раза (сопротивление стало 2,5 Ом). Если напряжение на концах проводника не изменилось, то сила тока стала ……….. A

Answer 1

Calculation of Current

To calculate the new current after reducing the resistance of the conductor, we can use Ohm's Law, which states that the current flowing through a conductor is equal to the voltage across the conductor divided by its resistance.

Given: - Initial resistance (R1) = 10 Ω - Initial current (I1) = 0.2 A - New resistance (R2) = 2.5 Ω

According to Ohm's Law, we can write the equation as:

I2 = V / R2

Since the voltage across the conductor remains unchanged, we can assume that V1 = V2. Therefore, we can rewrite the equation as:

I1 = I2 * (R1 / R2)

Substituting the given values:

0.2 A = I2 * (10 Ω / 2.5 Ω)

Simplifying the equation:

I2 = 0.2 A * (2.5 Ω / 10 Ω)

I2 = 0.2 A * 0.25

I2 = 0.05 A

Therefore, the new current after reducing the resistance of the conductor to 2.5 Ω is 0.05 A.