Electric Circuits

Which of the following circuits is NOT an example of a closed circuit?

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Below is a picture of a simple circuit. What is the purpose of the switch shown in

the circuit?

• to provide a source of electrical energy for the circuit

• to act as a receiver of the electrical energy

• to allow the light to flow through the circuit

• to open and close the circuit

Joy wants to build an electric circuit out of several pieces of wire, a light bulb, and

a battery. She decides she wants to add a switch to be able to open and close the

circuit. Which of the following could be used as a switch?

• plastic spoon

• metal button

• cotton string

• plastic paper clip

Tags

NGSS.MS-ETS1-2

Which of the circuits below produces light when the switch is closed?

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Tags

NGSS.4-PS3-2

NGSS.4-PS3-4

A student built the following circuit using four bulbs, three switches, and a battery

strong enough to provide electricity to the entire circuit. He notices that only some of

the light bulbs are on.

Which of the light bulbs in the circuit are on?

Choose TWO correct answers.

• bulbs 1 and 3

• bulb 2

• bulbs 3 and 2

• bulb 4

• bulbs 1 and 2

A string of lights with small bulbs is shown below. The bulbs are connected by a

wire that is covered with an insulator.

When the lights are on, electricity travels in —

• an incomplete path

• a sound wave

• a complete path

• a light wave

A group of students is building the circuit represented in the diagram.

Which object can be used at Position X for the buzzer to sound when switch K is

closed?

• a power source

• an insulated wire

• another bulb

• another switch

Tags

NGSS.MS-ETS1-1

Sarah is making a nightlight for her younger brother who is afraid of the dark. She wants to be

able to turn it on when he goes to bed and off when he wakes up. She has connected a battery to a bulb but realizes she can't control the flow of electricity in her circuit.

What essential component should Sarah add to the empty space to control when the nightlight turns on and off?

• A switch

• Another battery

• More wire

• Another bulb

Max is conducting a science experiment to test which materials allow electricity to flow. He sets up a circuit with a battery and a bulb, using different items to complete the circuit. He starts with a metal spoon, which successfully lights the bulb.

Which of these items, when replacing the spoon, will NOT allow the bulb to light up?

• A copper wire

• An aluminum foil strip

• A plastic ruler

• A steel paper clip

Tags

NGSS.MS-PS2-3

Most cars have lights, power locks, radios, and other equipment that use electricity. Electric

circuits power this equipment. Each circuit has a fuse that completes it. The picture below shows one type of fuse a car may have.

Which of these describes one thing that could happen if the wire in a car fuse burns out?

• The car’s lights will burn brighter.

• The car’s radio will not work.

• The car’s turn signal will blink too slowly.

• The car’s power windows will open faster.