Question

Якщо напруга на резисторі 24В, сила струму через резистор становить 1,2А. Якоюбуде сила струму, якщо напругузменшити до 18В? Допоможіть будь-ласка...))

Answer 1

Calculation of Current

To calculate the current through a resistor, we can use Ohm's Law, which states that the current (I) flowing through a resistor is equal to the voltage (V) across the resistor divided by the resistance (R) of the resistor. Mathematically, it can be represented as:

I = V / R

In this case, the voltage across the resistor is given as 24V and the current through the resistor is given as 1.2A. We can use these values to calculate the resistance of the resistor.

Calculation of Resistance

Rearranging Ohm's Law, we can solve for the resistance (R) of the resistor:

R = V / I

Substituting the given values, we have:

R = 24V / 1.2A = 20Ω

Therefore, the resistance of the resistor is 20Ω.

Calculation of Current with Reduced Voltage

Now, let's calculate the current through the resistor when the voltage is reduced to 18V. We can use the same formula:

I = V / R

Substituting the new voltage value of 18V and the resistance value of 20Ω, we have:

I = 18V / 20Ω = 0.9A

Therefore, when the voltage is reduced to 18V, the current through the resistor will be 0.9A.

Please note that these calculations assume that the resistance of the resistor remains constant.