Question

ПОМОГИТЕ С ФИЗИКОЙ :( Сила тока, текущего по проводнику сопротивление 6 ом, равна 2 А. Какое напряжение на концах проводника? Как изменится сила тока в данном проводнике, если напряжение на его концах увеличится в 4 раза? ​

Answer 1

Ответ: 12В; 8А

Объяснение:

Дано:

R=6 Ом

I1=2А

U2=4U1

-----------

U1-?; I2-?

U1=I1*R=2*6=12В

U2=4U1=4*12=48В

I2=U2/R=48/6=8А

Answer 2

Calculation of Voltage and Current

To calculate the voltage across a conductor, we can use Ohm's Law, which states that the voltage (V) is equal to the current (I) multiplied by the resistance (R). The formula is:

V = I * R

In this case, the current (I) is given as 2 A and the resistance (R) is given as 6 Ω. Plugging these values into the formula, we can calculate the voltage (V):

V = 2 A * 6 Ω = 12 V.

Therefore, the voltage across the conductor is 12 volts.

Change in Current with Increased Voltage

If the voltage across the conductor increases by a factor of 4, we can calculate the new current using the same formula. Let's denote the new voltage as V' and the new current as I'.

We know that the new voltage (V') is 4 times the original voltage (V):

V' = 4 * V = 4 * 12 V = 48 V.

Using Ohm's Law, we can rearrange the formula to solve for the new current (I'):

I' = V' / R.

Plugging in the values, we get:

I' = 48 V / 6 Ω = 8 A.

Therefore, if the voltage across the conductor increases by 4 times, the new current in the conductor will be 8 amperes.

I hope this helps! Let me know if you have any further questions.