Circuits

A student makes a circuit where a bulb is connected to a battery and a closed switch. The light bulb does not glow. Which action will most likely make the light bulb glow?

• Remove the light bulb from the circuit.
• Open the switch on the circuit.
• Remove the battery from the circuit.
• Replace the battery in the circuit.

What are the materials called that electricity cannot easily flow through, such as wood, plastic, rubber, and glass?

• Loads
• Power Sources
• Conductors
• Insulators

A circuit is shown below. Which difference will MOST likely make the light bulb brighter?

• use thicker wire
• use more strands of wire
• use a square battery
• use a stronger battery

Which items are needed to create a simple circuit?

• wire, battery, and a timer
• Wire, switch, and light bulb
• light bulb, switch, and battery
• light bulb, battery, and wire

Why is static electricity not useful as a power source?

• Because static electricity only occurs in lightning
• Because all energy is released at once in static electricity
• Because electrons aren't transferred in bursts of static electricity
• Because static electricity is not a real form of electricity

A student sets up a circuit. They use two light bulbs, wiring, and a battery. The setup is shown in the model. The student wonders why the light bulbs will not turn on. What must the student do to get the circuit working?

• The student must place the battery between the light bulbs.
• The student must switch the wire from the “-“ side to the “+” side of the battery.
• The student must connect an additional wire from bulb B to the “+” side of the battery.
• The student must remove the wire between bulb A and B. Then, he must connect it from bulb B to the “+” side of the battery.

If you create a circuit with multiple switches that power 4 light bulbs independently, you have made a...

• Series Circuit
• Parallel circuit
• Closed circuit
• Open circuit

What is a current?

• A power source that supplies electricity
• A wire along which electricity flows
• A short burst of electricity
• A steady flow of electricity

A student builds a circuit with a fan, a battery, and some wire. The battery is being drained too quickly. Which of these should the student add to the circuit so the battery drains more slowly?

• a switch, so the fan can be turned on and off
• a lightbulb, to show when the battery is getting low
• a different battery that provides less energy
• a different fan that requires more power

What is the function of a power source in a circuit?

• It provides a steady flow of electrons
• It provides a path along which the electricity can flow
• It provides a means through which the circuit can be broken
• It provides a steady soure of static electricity.