WorksheetsAC, effective value-1
Total questions: 8
Worksheet time: 8mins
Name
Class
Date
1.
The type of current where charges shake back and forth in a circuit
a)
Alternating Current
b)
Direct Current
c)
Voltage
d)
Switchback Current
2.
AC stands for ___.
a)
Alternating Current
b)
Attraction Connections
3.
Current that is used by most household appliances
a)
AC
b)
DC
c)
BC
d)
AC/DC
4.
Current from a battery is
a)
AC
b)
DC
c)
BC
d)
AC/DC
5.
RMS voltage of a sine wave is the same as:
a)
Effective voltage
b)
Average voltage
c)
Digital equivalent
d)
I can't think of another wrong answer
6.
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
a)
0.707 A
b)
1.414 A
c)
0.5 A
d)
1 A
7.
What is period
a)
Time required for a sine wave to complete one full cycle.
b)
It is equal to frequency.
c)
Unit = second
d)
T = 1/f
8.
The peak value of ac voltage on a 220 V mains is
a)
2002
b)
2202
c)
2220
d)
220
100 %
