Electric Currents

Which of the following does not determine the resistance of a wire?

• temperature

• color

• length

• diameter

A device for making or breaking an electric circuit.

• Cell

• Filament

• Electric switch

Tags

NGSS.MS-ETS1-1

The direction of current flow is taken from

• negative to positive terminal

• Positive to negative terminal

• Both

The complete path through which an electric current is flowing is called

• Open circuit

• Closed circuit

• Both

Materials which do not allow electricity to flow through it.

• Insulators

• Conductors

• None

Allows electricity to flow through them

• Conductors

• Insulators

• None

Electrical device has _____ terminals

• 4

• 3

• 2

Thin metal wire inside the electric bulb

• Fiber

• Terminal

• Filament

Tags

NGSS.MS-PS1-4

How does alternating current differ from direct current?

• Alternating current produces more voltage than direct current

• Alternating current always flows in the same direction; the direction of a direct current switches back and forth

• Direct current produces more voltage than alternating current

• Direct current always flows in the same direction; the direction of an alternating current switches back and forth

How does a generator create current?

• By using an electromagnet

• By using an internal combustion engine

• By using a fan

• By using energy from the sun

Tags

NGSS.MS-ETS1-1

NGSS.MS-PS3-5