VA Science

A student builds a circuit made up of a battery, two light bulbs, and a switch. What will the student most likely observe in this circuit?

• Light bulb 1 and light bulb 2 will both be on

• Light bulb 1 will be off, but light bulb 2 will be on

• Light bulb 1 and light bulb 2 will both be off

• Light bulb 1 will be on, but light bulb 2 will be off

The diagram shows a series circuit with three lit bulbs. How many of the bulbs will remain lit if the wire is cut a the point shown by the arrow?

• 0

• 1

• 2

• 3

Which of these changes to the electric circuit shown above will cause the lightbulb to light up.

• Straightening the wire so that the current can flow more easily

• Adding a switch and more wire so that the current can flow more easily

• Turning one battery so that its positive end connects to the other battery's negative end

• Making the length of wire the same on both sides of the lightbulb

A string of lights with small bulbs is shown below. The bulbs are connected by wire that is covered in an insulator. When the lights are on, electricity travels in....

• a complete circuit

• a sound wave

• a light ray

• an incomplete path

The diagram shows the metal posts that are usually found on a battery. The battery can be connected to a bell and a switch to produce sound. Which statement best explains why there are two metal posts on the battery?

• The battery needs only one metal post to connect to the bell, but the other post is present in case the first post fails to post.

• The battery needs to form a complete circuit that starts with one metal post and ends with the other metal post.

• One metal post makes a complete circuit with the switch, and the other metal post makes a complete circuit with the bell.

• One metal post makes the bell start to ring, and the other metal post makes the bell ring louder

Most cars have lights, power locks, radios and other equipment that uses electricity. Electric circuits power this equipment. Each circuit has a fuse that completes it. The picture shows one type of fuse a car may have. Which of these describe one thing that could happen if the wire in a car fuse burns out?

• The car's light will burn brighter

• The car's radio will not work

• The car's turn signal will blink to slowly

• The car's power windows will open faster

A group of students built the circuit shown above. The lightbulb does not glow. Which statement explains this observation?

• The battery is not charged

• The lightbulb is not part of a complete circuit

• The circuit does not have a switch

• The bell uses most of the energy from the battery

Many types of fans are used in homes. One type of electric fan is shown above. In addition to mechanical energy, which of these is produced as electric current passes through the circuit of this fan?

• Heat

• Mass

• Light

• Water Vapor

Tags

NGSS.MS-PS3-5

A simplified diagram of a system using solar energy is shown. To recharge the battery for later use without lighting the bulb, which of the following switches should be closed?

• switch S only

• switches R and S only

• switches R and T only

• switches R, S, and T

Tags

NGSS.MS-PS3-4

All the lightbulbs in this circuit are lit. Which change would cause all the bulbs to go out?

• Removing wire 1

• Removing wires 2 and 4

• Removing wires 2 and 5

• Removing wires 3 and 4