Adding more lamps in series will have what effect on total resistance?

Adding more lamps in series will have what effect on total resistance?

• A. It stays the same
• B. It increases
• C. It resets
• D. It decreases

Answer: (B)

In a series circuit, resistances simply add up. Each lamp has its own resistance, and the same current flows through every component, so the total opposition to current is the sum of all resistances in the path. When you add another lamp in series, you’re adding another resistance, so the total resistance goes up. With a fixed voltage source, current is I = V / R_total, so increasing R_total lowers the current. That typically makes the lamps dimmer because less current is flowing through them. This is why the total resistance increases when more lamps are placed in series.

In a series circuit, resistances simply add up. Each lamp has its own resistance, and the same current flows through every component, so the total opposition to current is the sum of all resistances in the path. When you add another lamp in series, you’re adding another resistance, so the total resistance goes up. With a fixed voltage source, current is I = V / R_total, so increasing R_total lowers the current. That typically makes the lamps dimmer because less current is flowing through them. This is why the total resistance increases when more lamps are placed in series.