All the rules and laws of D.C. circuit also apply to A.C. circuit containing_____________?
(A) capacitance only
(B) inductance only
(C) resistance only
(D) all above
The best place to install a capacitor is___________?
(A) very near to inductive load
(B) across the terminals of the inductive load
(C) far away from the inductive load
(D) any where
Power factor of an electrical circuit is equal to____________?
(A) R/Z
(B) cosine of phase angle difference be-tween current and voltage
(C) kW/kVA
(D) ratio of useful current to total cur¬rent Iw/I
(D) all of these
In a series resonant circuit, the impedance of the circuit is___________?
(A) minimum
(B) maximum
(C) zero
(D) none of the above
The r.m.s. value and mean value is the same in the case of___________?
(A) triangular wave
(B) sine wave
(C) square wave
(D) half wave rectified sine wave
For the same peak value, which of the following wave has the least mean value ?
(A) half wave rectified sine wave
(B) triangular wave
(C) sine wave
(D) square wave
The power consumed in a circuit element will be least when the phase difference between the current and voltage is________?
(A) 180″
(B) 90°
(C) 60°
(D) 0°
Two waves of the same frequency have opposite phase when the phase angle between them is_________?
(A) 360°
(B) 180°
(C) 90°
(D) 0°
If two sine waves of the same frequency have a phase difference of JT radians, then_______?
(A) both will reach their minimum values at the same instant
(B) both will reach their maximum values at the same instant
(C) when one wave reaches its maxi¬mum value, the other will reach its minimum value
(D) none of the above