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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 0° and 90°
Between 90° and 180°
No where
Between 180° and 270°

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AC Fundamentals, Circuit and Circuit Theory
The r.m.s. value of half wave rectified sine wave is 200 V. The r.m.s. value of full wave rectified AC. will be

111 V
282.8 V
100 V
141.4 V

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AC Fundamentals, Circuit and Circuit Theory
The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 ohm. If frequency is increased to 100 Hz, reactance becomes __________ ohms.

25
5
10
15

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AC Fundamentals, Circuit and Circuit Theory
What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value?

180°
30°
45°
90°

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AC Fundamentals, Circuit and Circuit Theory
The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q. If frequency is increased to 100 Hz, reactance becomes __________ ohms.

5
15
10
2.5

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AC Fundamentals, Circuit and Circuit Theory
The form factor is the ratio of

Peak value to r.m.s. value
r.m.s. value to average value
Average value to r.m.s. value
None of these

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