Ac and Dc currents.

What is an Alternating Current?

• An electric current that never changes direction.

• An electric current that changes direction many times.

• An electric current that has no frequency.

• A current that has no electrical properties.

What is a Direct Current?

• An electrical current flowing in many directions.

• A current with a high frequency.

• An electric current flowing in one direction only.

• A current that is never a straight line.

What is the difference between the movement of the two electrons between the two types of currents?

• There's no difference.

• An Alternating Currents electrons move in one direction while a Direct Currents electrons move back and forth.

• An Alternating Currents electrons move back and forth while a Direct Currents electrons move in one direction.

• An Alternating Currents electrons move back and forth while a Direct Currents electrons don't move at all.

Tags

NGSS.MS-PS2-3

What is a type of electric current that reverses direction periodically over time?

• Direct currents

• Alternating currents

What type of current more efficiently provides energy further distances?

• Alternating currents

• Direct currents

• Pulsating currents

• variable currents

What is the difference in frequency between the two currents?

• An Alternating Current has a frequency of 0hz, and a Direct Current usually has a frequency of 60hz.

• They both have a frequency of 60hz.

• An Alternating Current usually has a frequency of 60hz, and a Direct Current normally has a higher frequency.

• An Alternating Current usually has a frequency of 60hz, and a Direct Current has a frequency of 0hz.

What type of electricity is used in our houses?

• Direct Currents

• Alternating Currents

What is HZ when relating to frequency ?

• Hz is cycles per second.

• Hz is cycles per minute.

• Hz is height gained per second.

• Hz is height gained per minute.

What type of electric current moves from the positive polarity to a negative polarity and moves forward at all times?

• Direct Currents

• Alternating Currents

Which of these answer choices below is an example of how a Direct Current obtains its energy?

• Lights

• Television

• Computer

• Battery