AC vs DC

Diagram shows the flow of

• Alternating Current

• Direct Current

• Floating current

• Fluctuating current

Diagram shows the flow of

• Alternating Current

• Direct Current

• Floating current

• Fluctuating current

Tags

NGSS.HS-PS2-5

Alternating current is an electric current that ( )

• flows in on direction only

• flows in unknown directions

• flows in constantly reversing direction

• flows in specific direction depend on the type of circuit

Which of the following is not the function of Cathode Ray Oscilloscope (C.R.O.)?

• Show differences in shape of graph for DC and AC

• Show the direction of current for DC and AC

• Show the resistant for DC and AC

• Show the voltage change for DC and AC

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-5

Transformer is a device for changing the voltage of ( )

• Alternating current (AC)

• Direct current (DC)

• Direct and alternating current (DC & AC)

• Non of above

Tags

NGSS.HS-PS2-5

Current that reverses direction in a regular pattern is called ____.

• direct current 

• circuit current

• magnetic current

• alternating current 

What type of current is used in household power supplies?

• Alternating Current (AC)

• Direct Current (DC)

• Magnetic Current

• Static Current

Which type of current is typically used in battery-powered devices?

• Alternating Current (AC)

• Direct Current (DC)

• Magnetic Current

• Static Current

Who is credited with the invention of the alternating current (AC) system?

• Thomas Edison

• Nikola Tesla

• James Watt

• Michael Faraday

What is the main advantage of AC over DC for power transmission over long distances?

• Lower cost

• Higher efficiency

• Easier to transform to different voltages

• Less power loss

Tags

NGSS.HS-PS2-5