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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
The power consumed in a circuit element will be least when the phase difference between the current and voltage is

180°
90°
30°
60°

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AC Fundamentals, Circuit and Circuit Theory
A pure capacitor connected across an A.C. voltage consumed 50 W. This is due to

The current flowing in capacitor
The capacitive reactance in ohms
The size of the capacitor being quite big
The statement is incorrect

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AC Fundamentals, Circuit and Circuit Theory
Power factor of the system is kept high

To maximize the utilization of the capacities of generators, lines and transformers
To reduce voltage regulation of the line
All of the listed here
To reduce line losses

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AC Fundamentals, Circuit and Circuit Theory
Inductance affects the direct current flow

At all the time of operation
Only at the time of turning off
Only at the time of turning on
At the time of turning on and off

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

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

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AC Fundamentals, Circuit and Circuit Theory
The purpose of a parallel circuit resonance is to magnify

Frequency
Power
Voltage
Current

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