🔌 DC Circuits — Unit Quiz

A 9 V battery is connected to a 3 Ω resistor. What current flows through the resistor?

Three 4 Ω resistors are connected in series. What is the total resistance?

A 6 Ω and a 12 Ω resistor are connected in parallel across a 12 V battery. What is the voltage across the 6 Ω resistor?

A light bulb is rated 60 W at 120 V. What current flows through it when operating normally?

Two resistors R₁ and R₂ are connected in series to a battery. Select ALL correct statements.

Resistors R₁ = 4 Ω and R₂ = 12 Ω are connected in parallel. What is the equivalent resistance?

In a series circuit, a 12 V battery powers R₁ = 1 Ω, R₂ = 2 Ω, R₃ = 3 Ω in series. What is the voltage across R₃?

A 8 Ω resistor is connected directly across a 24 V battery. What power does it dissipate?

A 10 Ω resistor is in parallel with an unknown resistor R₂. The equivalent resistance is 6 Ω. What is R₂?

At a junction (node) in a circuit, two wires carry currents INTO the node: 3 A and 5 A. Select ALL correct statements.

A 20 V battery is in series with R₁ = 2 Ω and a parallel combination of R₂ = 6 Ω and R₃ = 12 Ω. What is the total current from the battery?

A battery with EMF = 12 V and internal resistance r = 1 Ω is connected to an external resistor R = 5 Ω. What is the terminal voltage across the battery's terminals?

A resistor R is connected to an ideal (constant-voltage) battery. If R is doubled, select ALL correct statements.

A 30 V battery connects to: R₁ = 3 Ω in series, then a parallel block of R₂ = 6 Ω and R₃ = 12 Ω, then R₄ = 1 Ω in series. (a) Find the total equivalent resistance. (b) Find the total current. (c) Find the voltage across the parallel block. (d) Find the current through R₃.

A 24 V battery connects to R₁ = 4 Ω in series with a parallel pair R₂ = 8 Ω and R₃ = 8 Ω. (a) Find the equivalent resistance. (b) Find the total current and the current through R₂. (c) Find the power dissipated by R₁. (d) Find the total power delivered by the battery and verify it equals the total power dissipated.