AC, effective value-1

The type of current where charges shake back and forth in a circuit

• Alternating Current
• Direct Current
• Voltage 
• Switchback Current

AC stands for ___.

• Alternating Current
• Attraction Connections

Current that is used by most household appliances

• AC
• DC
• BC
• AC/DC

Current from a battery is 

• AC
• DC
• BC
• AC/DC

RMS voltage of a sine wave is the same as: 

• Effective voltage
• Average voltage
• Digital equivalent
• I can't think of another wrong answer

一交流电的峰值为 2 A，电流的有效值是

The peak value of an ac current is 2 A, the effective value of the current is

• 0.707 A

• 1.414 A

• 0.5 A

• 1 A

What is period

• Time required for a sine wave to complete one full cycle.

• It is equal to frequency.

• Unit = second

• T = 1/f

The peak value of ac voltage on a 220 V mains is

• $200\sqrt{2}$

• $220\sqrt{2}$

• $\frac{220}{\sqrt{2}}$

• 220