Electrical energy and circuits

Metal is used to make electrical wires because_______.

• It allows an electric current to freely flow.
• It slows electric currents from flowing.
• It is very cheap.
• It is very expensive.

Tags

NGSS.4-PS3-2

NGSS.5-PS1-3

A student began building a circuit to light a bulb.  What else does the student need to produce light?

• a battery that has energy
• a wire that is insulated
• a switch that is open
• another bulb of the same size

Tags

NGSS.3-5-ETS1-1

NGSS.4-PS3-2

NGSS.4-PS3-4

An electric circuit with one path for an electric current is known as a:

• series curcuit

• parallel circuit

• voltage circuit

Whats units are used to measure electric currents?

• volts

• Newtons

• grams

• Amps

Which sub-particle has a negative charge?

• proton
• neutron
• electron
• both a neutron and an electron

Which of the two circuits would have the brightest bulbs? 

• A
• B

In a parallel circuit if one of the light bulbs burns out the rest _________.

• will become brighter
•  will still light up
•  will not light up
• will burn out due to too much energy

Which statement best describes the relationship between current, voltage, and resistance?

• A circuit's current decreases when higher voltage and lower resistance is applied.
• A current increases when lower voltage and higher resistance is applied.
• A current increases when higher voltage and lower resistance is applied.

A hot water heater rated at 2600 watts is wired to 120 V circuit. What is the current when turned on?

• 21.67 Ohms

• 21.67 amps

• 11.8 amps

• 16 amps

Tags

NGSS.HS-PS2-5

A heating element resistance is 24 ohms. The current measures 10 Amps. What is the power?

• 240 watts

• 1,200 watts

• 1,000 watts

• 2,400 watts

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4