In a parallel circuit, the voltage across each branch is the same.

In a parallel circuit, the voltage across each branch is the same.

• A. Current
• B. Voltage
• C. Resistance
• D. Power

Answer: (B)

In a parallel circuit, all branches share the same two connection points, so they all have the same potential difference across them—the supply voltage. That means the voltage across each branch is equal to the source voltage, regardless of how their resistances compare. Ohm’s law shows why currents differ: a branch with lower resistance will draw more current, since I = V/R_branch, while the voltage across that branch stays the same. The total current is the sum of the branch currents, and the overall resistance is found from 1/R_total = sum(1/R_i). Power in a branch depends on that same voltage or current, via P = V^2/R or P = I^2R.

In a parallel circuit, all branches share the same two connection points, so they all have the same potential difference across them—the supply voltage. That means the voltage across each branch is equal to the source voltage, regardless of how their resistances compare. Ohm’s law shows why currents differ: a branch with lower resistance will draw more current, since I = V/R_branch, while the voltage across that branch stays the same. The total current is the sum of the branch currents, and the overall resistance is found from 1/R_total = sum(1/R_i). Power in a branch depends on that same voltage or current, via P = V^2/R or P = I^2R.