Yes, I know the formula. It is called Ohm's Law.
Why do you write "8 Ohm resistors" if there is only one of them?
Do you know the formula for this?
Why do you write "8 Ohm resistors" if there is only one of them?
thanks
9.6V
14.4V
20V
24V
U1= I•R1= 1.2•8 = 9.6 V,
U2= I •R2=1.2•12=14.4 V.
In this case, the resistors have resistances of 12 Ù and 8 Ù, and the source has an electromotive force (emf) of 24 V. We need to find the potential difference across the 8 Ù resistor.
To find the potential difference across a resistor in a series circuit, we can use Ohm's Law, which states that V = I * R, where V is the potential difference (voltage), I is the current, and R is the resistance.
Since the resistors are in series, the current is the same for both resistors. Let's call this current I.
Now, we can use the equation V_total = I * R_total to find the current. In this case, V_total is 24 V and R_total is the sum of the resistances:
R_total = 12 Ù + 8 Ù = 20 Ù
So the equation becomes:
24 V = I * 20 Ù
To find the current I, we can rearrange the equation:
I = 24 V / 20 Ù = 1.2 A
Now that we know the current, we can calculate the potential difference across the 8 Ù resistor using Ohm's Law:
V_8Ù = I * R_8Ù = 1.2 A * 8 Ù = 9.6 V
Therefore, the potential difference across the 8 Ù resistor is 9.6 V.