Electricity basics

What carries the current in a copper wire?

• Protons

• Holes

• Electrons

• An electric field

Which way does current flow?

• From red to black

• From black to red

• From negative to positive

• From positive to negative

What is the unit that current is measured in?

• Volts

• Amps

• Ohms

• Farads

What do we use to measure current?

• Voltmeter

• Ammeter

• Ohmmeter

• Trimeter

What is the unit for charge?

• Volts

• Amps

• Ohms

• Coulombs

What is an electrical insulator?

• Something that keeps you warm

• Something that conducts electricity

• Something that doesn't conduct electricity

• Something that slows electricity

Which way do the electrons in a circuit move?

• From black to red

• From positive to negative

• From negative to positive

• Clockwise

What is the equation that relates potential difference, current and resistance?

• I=VR

• R=I/V

• V=IR

• VI=R

What is potential difference?

• The difference between the 2 ends of a battery

• A measure of how much energy the electrons have

• A measure of how quickly the electrons are moving

• A measure of how many electrons are flowing

What unit is potential difference measured in?

• Volts

• Amps

• Ohms

• Coulombs