Adding Another Bulb (Output Device) to a Circuit System

How will the brightness of the bulb (output device) change if we add another bulb to this circuit system?

• The brightness of the bulb will decrease.
• The brightness of the bulb will remain the same.
• The brightness of the bulb will increase.
• The bulb will turn off completely.

Why does the brightness change in this circuit system?

• The brightness is constant regardless of circuit changes.
• The brightness changes due to the color of the wires used.
• The brightness is affected by the temperature of the circuit.
• The brightness changes due to amount of voltage, current, or resistance in the circuit.

What type of circuit system was created by adding another bulb (output device) to this system?

• Parallel circuit system
• Open circuit system
• Series circuit system
• Short circuit system