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Chapter 16 - Alternating Current - 3
1.
When an AC is generated then the direction of:
a) Current remains constant
b) Both voltage and current changes.
c) Voltage remains constant
d) Voltage changes but direction of current does not
2.
The most common source of AC voltage is:
a) Cell
b) AC generator
c) AC transformer
d) Motor
3.
Such current which is measured at any instant w.r.t. some reference point is called:
a) Peak current
b) Peak to peak current
c) Instantaneous current
d) AC
4.
AC varies as function of :
a) Voltage
b) displacement
c) Current
d) Time
5.
The magnitude of instantaneous alternating voltage can be expressed by:
a) V=IoCos θ
b) none
c) V=VoSin θ
d) I=IoSec θ
6.
Square of the average value of voltage of or AC is called:
a) p-p value
b) none
c) Peak value
d) Rms
7.
The magnitude of r.m.s value of voltage can be expressed as:
a) Vrms=Vo+Vo
b) Vrms=Vo/ √2
c) Vrms=Vo2+Vo2/2
d) All of the above
8.
An AC voltmeter reads 220v its peak value is:
a) 311.12V
b) 350V
c) 220V
d) 250V
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