You know the rule: series resistances add. This lesson makes the move quick, whatever the mix of components.
Now a third resistance joins the same path: 6.0 Ω, 9.0 Ω, and 15 Ω.
The components can be bulbs, resistors, or a motor. Add every resistance on the loop, in ohms. Two values or five, the move is one addition.
Resistors of 6.0 Ω, 9.0 Ω, and 15 Ω are connected in series. What is the total resistance?
Write down the values in the question:
R₁ = 6.0 Ω; R₂ = 9.0 Ω; R₃ = 15 Ω; R_total = ?
Write down the equation:
R_total = R₁ + R₂ + R₃
Substitute in the values, and calculate:
R_total = 6.0 + 9.0 + 15 = 30
The total resistance is 30 Ω.
Resistors of 4.0 Ω and 7.5 Ω sit in series. What is the total resistance?
Resistors of 22 Ω and 38 Ω sit in series. What is the total resistance?
Resistors of 12 Ω and 18 Ω in series give a total of…
In the same circuit, the 15 Ω resistor is swapped for a 24 Ω resistor. What is the total resistance now?
Write down the values in the question:
R₁ = 6.0 Ω; R₂ = 9.0 Ω; R₃ = 24 Ω; R_total = ?
Write down the equation:
R_total = R₁ + R₂ + R₃
Substitute in the values, and calculate:
R_total = 6.0 + 9.0 + 24 = 39
The total resistance is 39 Ω.
Series resistors: 5.5 Ω, 6.5 Ω, and 14 Ω. What is the total resistance?
A bulb (18 Ω) and motor (27 Ω) sit in series. What is their total resistance?
Series resistances of 31 Ω, 49 Ω, and 15 Ω. What is the total?
A series circuit contains resistances of 8.0 Ω, 15 Ω, and 24 Ω. What is the total resistance?
A 35 Ω buzzer coil, a 50 Ω resistor, and a 65 Ω bulb run in series. What is the total resistance?
Four series resistances: 10 Ω, 20 Ω, 30 Ω, and 40 Ω. What is the total resistance?