Which circuit type has the same current through the entire loop?

Which circuit type has the same current through the entire loop?

• A. Open circuit
• B. Series circuit
• C. Parallel circuit
• D. Combination circuit

Answer: (B)

In a single loop where components are connected end to end, there is only one path for current to follow. The same amount of charge must flow through each element in order, so the current is identical everywhere around the loop. This is what defines a series circuit: all components share the same current. In contrast, current can split in parallel branches, so the current through each branch can differ and the total current is the sum of the branch currents. An open circuit blocks the path, resulting in essentially no current, while a combination circuit contains both series and parallel parts, so you don’t have the same current throughout the entire network.

In a single loop where components are connected end to end, there is only one path for current to follow. The same amount of charge must flow through each element in order, so the current is identical everywhere around the loop. This is what defines a series circuit: all components share the same current. In contrast, current can split in parallel branches, so the current through each branch can differ and the total current is the sum of the branch currents. An open circuit blocks the path, resulting in essentially no current, while a combination circuit contains both series and parallel parts, so you don’t have the same current throughout the entire network.