Energy, Electrical currents and Waves

What best descibes electric voltage

• The amount of electrical energy inside a battery

• The work needed to move an electic charge between 2 points

• The rate at which an electric charge moves

What is electric current?

• A material's resistance to the flow of electric charge

• The number of electric charges that pass a given point

• The rate at which electric charges pass a given point

Tags

NGSS.HS-PS3-5

What combination of materials supplies the most amount of resistance to an electric current?

• Plastic and wood

• copper and steel

• wood and steel

Which electronic device uses alternating current? Select all that apply

• Flashlight

• digital camera

• dishwasher

• refrigerator

What is the best reason why string lights for the outdoors should be wired in a parallel circuit and not a series circuit?

• if one light goes out, the rest of the lights will continue to shine

• parallel circuits are safer to use than a series circuit

• the lights in a parallel circuit will shine brighter than in a series circuit

When a student is connecting a simple circuit to a battery, light bulb and copper wires, the light bulb did not light up. Why might it not light up?

• There is no energy source

• The circuit is too simple to light up a bulb

• The circuit is open

Tags

NGSS.MS-ETS1-1

Why is it dangerous to fly a kite at night during a thunderstorm ?

• Lightning strikes moving objects like a kite

• Lightning strikes objects high above the ground

• Lightning stikes objects made of fabric

Which circuit is on the left

• Series

• Parallel

Which circuit is on the right?

• Series

• Parallel

Tags

NGSS.MS-ETS1-2

If Wire A has a high resistance and Wire B has a low resistance, which of the following is true?

• Wire A is a poor conductor and Wire B is a good conductor

• Wire A is a good conductor and Wire B is a poor conductor

• Wiew A is shorter and thicker than B