Which circuit contains only one path for current, making the current common through all components?

Which circuit contains only one path for current, making the current common through all components?

• A. Series Circuits
• B. Parallel Circuits
• C. Open Circuits
• D. Short Circuits

Answer: (A)

In a series circuit there is only one path for current to follow, so the same amount of current flows through every component in the chain. The charge that leaves one component must return through the next, leaving no branches for current to split. That’s why the current is common through all parts. The total resistance adds up (R total = R1 + R2 + ...), so the overall current is I = V / R total, and each component drops a voltage proportional to its resistance (V = I × R). This differs from parallel circuits, where current splits among multiple paths, so the current isn’t the same in every branch; an open circuit means there’s no complete path and no current flows; a short circuit creates a very low-resistance path that bypasses the loads, altering how current distributes.

In a series circuit there is only one path for current to follow, so the same amount of current flows through every component in the chain. The charge that leaves one component must return through the next, leaving no branches for current to split. That’s why the current is common through all parts. The total resistance adds up (R total = R1 + R2 + ...), so the overall current is I = V / R total, and each component drops a voltage proportional to its resistance (V = I × R).

This differs from parallel circuits, where current splits among multiple paths, so the current isn’t the same in every branch; an open circuit means there’s no complete path and no current flows; a short circuit creates a very low-resistance path that bypasses the loads, altering how current distributes.