Measuring Current, Voltage, and Resistance

If a toaster produces 12 ohms of resistance in a 120-volt circuit, what is the amount of current in the circuit?

• 5A

• 10A

• 15A

• 20A

The movement of electrons from atom to atom in a line results in a flow of _____.

• amperage.

• electric current.

• electromagnetic connectors. 

Tags

NGSS.HS-PS2-5

As the resistance of a circuit increases, the current will

• increase

• decrease

• stay the same

Resistance is

• Measured using an ammeter

• Units are 'volts'

• How difficult it is for electrons to move through an object

• The continuous movement of electrons in a wire

A conductor has _____ resistance. An insulator has ______ resistance.

• Low; high.

• Negative; positive.

• Positive, negative.

• High, low.

A resistor

• Is the same as resistance

• Is connected to a circuit in parallel

• Is used in a circuit to control the amount of current

• Is not measured in ohms

Which two changes to a metal wire both increase resistance?

• decreasing its length and increasing its temperature

• increasing its length and decreasing its temperature

• decreasing its thickness and increasing its temperature

• increasing its thickness and decreasing its temperature

What is the unit of measure for current?

• ampere

• current

• voltage

• ohms

What unit of measure is for resistance?

• ohms

• ampere

• voltage

• watts

What moves when we say that there is current?

• inductors

• conductors

• electrons

• atoms

Tags

NGSS.HS-PS2-5