Electrical Circuit Gizmo

If all four switches below are turned on, which light bulb will light up? (W is wood, S is silver, and Y is yarn.)

• Circuit A

• Circuit B

• Circuit C

• Circuit D

What will happen when a light bulb is removed from the circuit below, leaving a gap?

• The remaining light bulbs will go out.

• The remaining light bulbs will dim.

• The brightness of the remaining light bulbs will not change.

• The remaining light bulbs will brighten.

What will happen when a light bulb is removed from the circuit below?

• The remaining light bulbs will go out.

• The remaining light bulbs will dim.

• The brightness of the remaining light bulbs will not change.

• The remaining light bulbs will brighten.

What will happen when a light bulb is added on the left side of this circuit (where the arrow is)?

• The remaining light bulbs will go out.

• The remaining light bulbs will dim.

• The brightness of the remaining light bulbs will not change.

• The remaining light bulbs will brighten.

What is the role of a fuse?

• A fuse is used to turn lights on and off.

• A fuse is used to increase the current in a circuit.

• A fuse is used to create a short circuit.

• A fuse is used to break a circuit when there is too much current.