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AC Fundamentals, Circuit and Circuit Theory
AC Fundamentals, Circuit and Circuit Theory
In a sine wave the slope is constant
Between 0Â° and 90Â°
Between 90Â° and 180Â°
No where
Between 180Â° and 270Â°
Between 0Â° and 90Â°
Between 90Â° and 180Â°
No where
Between 180Â° and 270Â°
Answer
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AC Fundamentals, Circuit and Circuit Theory
The phosphors for which of the following pair are 180Â° out of phase for VL, VC and VR?
VC and VL
VL and VR
None of these
VC and VR
VC and VL
VL and VR
None of these
VC and VR
Answer
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AC Fundamentals, Circuit and Circuit Theory
The square waveform of current has following relation between r.m.s. value and average value.
r.m.s. value is equal to average value
None of these
r.m.s. value of current is less than average value
r.m.s. value of current is greater than average value
r.m.s. value is equal to average value
None of these
r.m.s. value of current is less than average value
r.m.s. value of current is greater than average value
Answer
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AC Fundamentals, Circuit and Circuit Theory
The time constant of the capacitance circuit is defined as the time during which voltage
Falls to 36.8% of its final steady value
None of these
Rises to 63.2% of its final steady value
Rises to 38.6% of its final steady value
Falls to 36.8% of its final steady value
None of these
Rises to 63.2% of its final steady value
Rises to 38.6% of its final steady value
Answer
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AC Fundamentals, Circuit and Circuit Theory
The period of a sine wave is ___________ seconds. Its frequency is
20 Hz
50 Hz
40 Hz
30 Hz
20 Hz
50 Hz
40 Hz
30 Hz
Answer
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