What is the current in the circuit if R1=7 R 2 =15, and the voltage is 220 volts? Is the answer 10 amps, 12 amps, 20 amps or 242 amps
If DC circuit, then I = E/R but you must determine Reffective and that depends upon if they are in series or parallel.
To determine the current in a circuit, you need to use Ohm's Law, which states that the current (I) flowing through a circuit is equal to the voltage (V) divided by the resistance (R). In this case, the circuit consists of two resistors, R1 and R2, connected in series.
First, you need to find the equivalent resistance (RT) of the circuit. For resistors connected in series, you can calculate the total resistance by adding their individual resistances together: RT = R1 + R2.
Given R1 = 7 ohms and R2 = 15 ohms, the equivalent resistance (RT) would be RT = 7 + 15 = 22 ohms.
Next, apply Ohm's Law to calculate the current (I). The formula is: I = V / R. In this case, the voltage (V) is given as 220 volts and the resistance (R) is the equivalent resistance (RT) we calculated earlier.
Therefore, I = 220 / 22 = 10 amps.
So, the correct answer is 10 amps.