Current and resistance

What electrical component measures current?

• Thermistor

• Resistor

• Voltmeter

• Ammeter

What is the definition of electrical current?

• The opposition to the flow of electrons

• The rate of flow of charge

• The work done on each coulomb of charge

• Electrons moving around

Which equation links current, charge flow, and time?

• Current = Time / Charge flow

• Charge flow = current x time

• Current = charge flow x time

• Time = charge flow x current

As the resistance of a circuit increases, the current will

• increase
• decrease
• stay the same

Resistance is measured in ___. 

• watts. 
• amps.
• ohms.

A 3A current flows through a television. How long would it take for 1500C to flow through it?

• 4500s

• 500s

• 50s

• 450s

How much charge flows through a wire in 80s if the current is a constant 5.4A?

• 432C

• 360C

• 524C

• 344C

The current in a wire is 1.2kA. What is the current in Amps?

• 120A

• 12A

• 0.12A

• 1200A

Select all units of current in the list below:

• mA

• C

• V

• A

• m

How do you calculate resistance?

• Divide voltage by current

• Divide charge by current

• Multiply current by voltage

• Multiply voltage and current