Question

Потужність струму в резисторі опором 25 Ом дорівнює 4 Вт. Визначте Напругу та силу струму на резисторі. Напруга? Сила струму? 60 балов срочно!

Answer 1

Ответ:

Объяснение:

Дано:

Р=4Вт

R=25Ом

Знайти:

U-?

I-?

U=√PR=√25*4=10B

I=U/R=10/25=0,4A

Answer 2

Calculation of Voltage and Current

To determine the voltage and current in a resistor, we can use Ohm's Law, which states that the voltage across a resistor is equal to the current flowing through it multiplied by its resistance. Mathematically, Ohm's Law can be expressed as:

V = I * R

Where: - V is the voltage across the resistor, - I is the current flowing through the resistor, and - R is the resistance of the resistor.

In this case, we are given that the power of the current in the resistor is 4 W and the resistance is 25 Ω. We can use this information to calculate the voltage and current.

Calculation of Voltage

The power in a resistor can also be calculated using the formula:

P = V^2 / R

Where: - P is the power, - V is the voltage, and - R is the resistance.

Given that the power is 4 W and the resistance is 25 Ω, we can rearrange the formula to solve for V:

V = sqrt(P * R)

Substituting the given values:

V = sqrt(4 * 25) = sqrt(100) = 10 V

Therefore, the voltage across the resistor is 10 V.

Calculation of Current

Using Ohm's Law, we can calculate the current flowing through the resistor:

V = I * R

Rearranging the formula to solve for I:

I = V / R

Substituting the values:

I = 10 V / 25 Ω = 0.4 A

Therefore, the current flowing through the resistor is 0.4 A.

To summarize: - The voltage across the resistor is 10 V. - The current flowing through the resistor is 0.4 A.

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