Physical Science Ch. 19

Electrons have what charge?

• positive

• neutral

• negative

• positive and negative

Tags

NGSS.MS-PS2-3

All three light bulbs in this image would turn off if you cut the wire at which point?

• point A

• point B

• point C

• point D

Why are parallel circuits used in the wiring of houses and other buildings, rather than series circuits?

• because in a series circuit, all devices must be turned on in order for current to flow

• because too much wire would be needed for a series circuit for an entire building

• because in a series circuit, if you turn on one device, all of the devices turn on

• because power plants generate electricity that can only flow in parallel circuits

Why is it dangerous to use 120-volt household electrical devices near water?

• because the water might become electrically charged

• because water is a good conductor and might carry current to your body

• because the water might cause the device to break and cause damage

• because the water might trigger a ground-fault circuit interruptor

Why is the light bulb not on, in this image?

• the battery is used up

• the bulb is burned out

• the circuit is open

• the circuit is closed

Tags

NGSS.MS-ETS1-1

Which is true of all electric circuits?

• they all use the same voltage

• they all have the same level of electric resistance

• they all transform electric energy into radiant energy

• electrically charged particles move through all of them

Which of the following materials is the best conductor?

• iron

• plastic

• glass

• rubber

If a neutral atom gains an electron, what is its charge?

• positive

• neutral

• negative

• positive and negative

What is represented in the image shown here?

• two electrons repelling each other

• an electron and a proton attracting each other

• two protons attracting each other

• two protons repelling each other

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Electric current should pass through a __________ after being transmitted by a power plant and before it enters your home.

• turbine

• generator

• step-up transformer

• step-down transformer