Unit 4 Electricity, Circuits, Conductors, Insulators, & Magnets.

A students wants to design a complete circuit, simple circuit for a class project. The student has more materials available than are needed for the project.

What does a complete, simple circuit require to work?

• A. WIRE & A SWITH

• B. WIRE & A LIGHT BULB

• C. WIRE, BATTERY, & A SWITCH

• D. WIRE, A BATTERY, & A LIGHT BULB

Which component should be placed at position X to make a complete electric circuit?

• A. wire

• B. switch

• c. light bulb

• D. battery

Will the light bulb light up? Why or why not?

• A. No, because the wires need to be attached to opposite ends of the battery to complete the circuit.

• B. No, because she did not add a switch between the battery and light bulb to complete the circuit.

• C. Yes, because the circuit is a complete loop so the electricity will flow all the way around.

• D. Yes, because the circuit has all the right paths in the correct order for electricity to flow.

How can this circuit be completed?

• A. Attach the wires.

• B. Flip the switch open.

• C. Move the battery closer to the bulb.

• D. Flip the battery to reverse the charges.

A student is designing a simple electrical circuit. She wants to create circuit using items she has in her house. She finds some wire and a light bulb. Which other item will she need to complete her electrical circuit?

• A. motor

• B. switch

• C. wood base

• D. power source

The diagram shows part of a circuit.

What would complete the circuit?

• A. An open switch between the two lights bulbs would complete the circuit.

• B. A connecting wire between the two light bulbs would complete the circuit.

• C. A second wire connecting the right bulb to the positive battery to the positive battery terminal would complete the circuit.

• D. A second battery between the left light bulb and the negative battery terminal would complete the circuit.

The diagram shows a circuit that a student creates for her science class. She used a battery and a rope connected to a light bulb.

Her classmates predict that the light bulb will light up.

What is most likely the reason for their prediction?

• A. The battery is too large.

• B. The power source is missing.

• C. The rope will not conduct electricity.

• D. The switch is missing from the circuit.

Which of the following is the best electrical conductor?

• A. cotton ball

• B. metal nickel

• C. packing foam

• D. plastic toy

What is a material called if it does not conduct energy well?

• A. insulator

• B. conductor

• C. radiator

• D. reflector

Ramon has to magnets. He put a wooden board between the magnets. The magnets were not attracted to each other. Why?

• A. The wooden board was too thick.

• B. The magnets were too big.

• C. Magnetism was stopped by the wood.

• D. Magnetism does not work between two magnets.