If a circuit has a 15V battery and two resistors (R1 = 5Ω, R2 = 10Ω) in series,
Practice Questions
Q1
If a circuit has a 15V battery and two resistors (R1 = 5Ω, R2 = 10Ω) in series, what is the voltage across R2?
10V
5V
15V
0V
Questions & Step-by-Step Solutions
If a circuit has a 15V battery and two resistors (R1 = 5Ω, R2 = 10Ω) in series, what is the voltage across R2?
Step 1: Identify the total voltage from the battery, which is 15V.
Step 2: Identify the values of the resistors: R1 = 5Ω and R2 = 10Ω.
Step 3: Calculate the total resistance in the circuit by adding R1 and R2: Total Resistance = R1 + R2 = 5Ω + 10Ω = 15Ω.
Step 4: Use the formula to find the voltage across R2: Voltage across R2 = (R2 / Total Resistance) * Total Voltage.
Step 5: Substitute the values into the formula: Voltage across R2 = (10Ω / 15Ω) * 15V.
Step 6: Simplify the calculation: Voltage across R2 = (10 / 15) * 15V = 10V.
Voltage Division – The concept of voltage division in series circuits, where the voltage across a resistor is proportional to its resistance relative to the total resistance.
Ohm's Law – Understanding the relationship between voltage, current, and resistance in electrical circuits.
