If a lamp breaks or a component is disconnected in series, what happens?

If a lamp breaks or a component is disconnected in series, what happens?

• A. Current doubles
• B. Circuit is broken and components stop working
• C. Reduced brightness
• D. It remains on

Answer: (B)

In a series circuit there is a single path for current through all components. If a lamp breaks or a component becomes disconnected, that path is opened, so current cannot flow at all. With no current, every device in the series stops working—the whole string goes dark. The current in a closed series loop can’t increase when a break occurs; it drops to zero instead, which is why it doesn’t just dim or stay on. This contrasts with a parallel arrangement, where a break in one branch can leave others still illuminated, but in series, an open breaks the entire circuit.

In a series circuit there is a single path for current through all components. If a lamp breaks or a component becomes disconnected, that path is opened, so current cannot flow at all. With no current, every device in the series stops working—the whole string goes dark. The current in a closed series loop can’t increase when a break occurs; it drops to zero instead, which is why it doesn’t just dim or stay on. This contrasts with a parallel arrangement, where a break in one branch can leave others still illuminated, but in series, an open breaks the entire circuit.