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AC Fundamentals, Circuit and Circuit Theory

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 r.m.s. value of pure cosine function is

0.5 of peak value
0.707 of peak value
Zero
Same as peak value

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

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

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AC Fundamentals, Circuit and Circuit Theory
The inductance of a coil can be increased by

Increasing core length
Decreasing the diameter of the former
Decreasing the number of turns
Choosing core material having high relative permeability

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AC Fundamentals, Circuit and Circuit Theory
When an alternating current passes through an ohmic resistance the electrical power converted into heat is

Reactive power
Active power
Apparent power
None of the listed here

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AC Fundamentals, Circuit and Circuit Theory
For a sine wave with peak value Emax ___________ the average value is

None of the listed here
0.707 Emax
0.434 Emax
0.636 Emax

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