CP Physical Science Electricity test prep

A chemical reaction occurs within the battery that causes a voltage to be produced so current can flow.

• True

• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Why do batteries die over time?

• The electrolytes have gotten cold.

• The battery can’t hold a positive charge anymore.

• The battery can’t hold a negative charge anymore.

• The electrolytes in the battery can’t react anymore and have thus reached equilibrium.

Which of the following is a benefit of AC compared to DC power?

• AC takes less time to install

• DC is way more dangerous

• DC costs more money

• AC can travel further distances

What is the purpose of including resistors in circuits?

• To reduce your electric bill every month

• To keep voltage constant throughout a circuit

• To reduce the current going to something

• To reduce the heat being produced in a wire

9. As voltage _________, current __________.

• Increases, decreases
• Increases, increases
• Decreases, increases

• None of the above are correct

Which of the following is incorrect?

• Ammeter measures resistance

• Voltmeter measure volts

• Ohmmeter measures resistance

• Ammeter measures current

To increase resistance in a wire you can:

• Lengthen the wire

• Increase the wire thickness

• Use materials that are good conductors

• Let the wire cool down

Thomas Edison thought alternating current was too dangerous and did a smear campaign to scare people from using it.

• True

• False

Which circuit would produce the brightest light bulbs?

• Two bulbs in series with a 5V battery

• Two bulbs in series with two 5V batteries

• Two bulbs in parallel with a 5V battery

• Two bulbs in parallel with two 5V batteries.

Which is NOT a good insulator?

• Plastic

• Aluminum

• Rubber

• Glass

Tags

NGSS.MS-PS3-3