A circuit contains a 12V battery and two resistors of 4 ohms and 8 ohms in serie
Practice Questions
Q1
A circuit contains a 12V battery and two resistors of 4 ohms and 8 ohms in series. What is the total current in the circuit?
1 A
0.5 A
2 A
3 A
Questions & Step-by-Step Solutions
A circuit contains a 12V battery and two resistors of 4 ohms and 8 ohms in series. What is the total current in the circuit?
Step 1: Identify the voltage of the battery, which is 12V.
Step 2: Identify the values of the resistors, which are 4 ohms and 8 ohms.
Step 3: Calculate the total resistance in the circuit by adding the two resistors together: 4 ohms + 8 ohms = 12 ohms.
Step 4: Use Ohm's Law to find the current. Ohm's Law states that Current (I) = Voltage (V) / Resistance (R).
Step 5: Substitute the values into the formula: I = 12V / 12 ohms.
Step 6: Calculate the current: 12V / 12 ohms = 1 A.
Ohm's Law – Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor.
Series Circuits – In a series circuit, the total resistance is the sum of the individual resistances, and the same current flows through all components.
