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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
In a series resonant circuit, the impedance of the circuit is

Minimum
Zero
None of these
Maximum

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

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AC Fundamentals, Circuit and Circuit Theory
In R-L-C series resonant circuit magnitude of resonance frequency can be changed by changing the value of

R only
L only
L or C
C only

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AC Fundamentals, Circuit and Circuit Theory
The phosphors for which of the following pair are 180° out of phase for VL, VC and VR?

VC and VL
None of the listed here
VC and VR
VL and VR

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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
Same as peak value
Zero

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AC Fundamentals, Circuit and Circuit Theory
In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will

Be four times as high
Be reduced to one fourth
Be reduced by half
Be doubled

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