Electric Current

An object through which electrons can easily flow is called a(n) ___________.

• Conductor

• Insulator

What size resistor would produce a 3 Amp current flow with a 12 Volt battery

• 1 Ohm

• 3 Ohms

• 4 Ohms

• 12 Ohms

What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?

• 25 V

• 10 V

• 2.5 V

• 0.4 V

What are insulators?

• materials that let electrical current to flow freely through it

• materials that do not let electrical current to flow freely through it

• materials that cannot be heated

• materials that take shorter time to be heated

Tags

NGSS.MS-PS2-3

What are needed to make a complete closed circuit?

• buzzer, bulb, switch

• battery, buzzer, bulb

• battery, bulb, wires

• switch, bulb, wires, buzzer

Electricity happens when ... move from one place to another.

• battery

• light

• electrons

• electromagnet

What is a battery?

• a power source that gives out electricity

• a device for making and breaking the connection in an electric circuit

• a flexible metal thread to connect parts of an electric circuit

• a beeper or an audio signaling device

What are some examples of conductors?

• gold

• copper

• iron

• rubber

Tags

NGSS.MS-PS2-3

How do electrons move in an electric circuit?

• from positive terminal to negative terminal

• from negative terminal to positive terminal

• from positive terminal to positive terminal

• from negative terminal to negative terminal

What will happen to the light bulb if we open the switch in a closed circuit?

• it will be broken

• it will turn off

• it will turn on

• it will make sound