Circuits 1,2

Which of the following statements is false?

• Electricity is closely related to magnetism.

• Electricity is an attraction and repulsion

  between small particles in a material

• Electricity is stronger than gravity because

  its effects are never balanced out.

• Electricity can be created by pressure,

  chemistry, light, friction, and magnetism.

Tags

NGSS.MS-PS2-3

Which of these products is electrical but not

electronic?

• Something using transistors and capacitors.

• Drill

• Computer

• Radio

Which of the following statements is false?

• Wire length and size never matter.

• Wires are made of metals like copper.

• Wires offer low resistance to the flow of

  electricity.

• Most wires have a colored coating for

  protection and identification.

An electrical ground is . . .

• the bottom point on which circuits are

  constructed.

• the 0V or “–” side of a battery or other

  voltage source, sometimes connected to

  lightning rods.

• a board used as a frame for building circuits.

• All of the above.

Advantages of printed circuit boards include . . .

• metal strips are “printed” on the surface to

  make interconnections.

• they are a stable platform for mounting

  components.

• they allow circuits to be made smaller and

  less expensive.

• All of the above.

Which of the following would all be connected

in series?

• A lamp and a switch on the wall controlling

  it.

• Two lamps in a room controlled by the

  same switch.

• Two lamps in different rooms of a house.

• The air conditioner and microwave oven in

  your home.

Which of the following would all be connected

in parallel?

• A lamp and a switch on the wall controlling

  it.

• The streetlamps in your neighborhood.

• A string of inexpensive Christmas lights that

  all go out if one bulb is loose.

• None of the above.

It is better to connect lamps in a parallel circuit

configuration when . .

• the power source can supply enough current

  but not enough voltage to light them all.

• if one bulb burns out, you want the others to

  still light.

• you are also adding switches to control

  each lamp separately.

• All of the above.

A short circuit is . . .

• a special condition that improves circuit

  performance in most cases.

• an accidental no-resistance path between

  different parts of a circuit.

• the shortest wiring path between two points

  in a circuit.

• All of the above.

Solder is . . .

• glue that holds components in place, it

  resists the flow of electricity.

• always applied by hand.

• a metal that is melted to make solid electrical

  connections.

• a special metal made of copper and other

  alloys that melts at a low temperature.

Tags

NGSS.MS-PS3-3