AC Circuit objective questions (mcq) and answers

26.  Unit of inductive reactance is

   A. Henry

   B. Millihenry

   C. Wb

   D. Ohm

27.  The r.m.s. value of a sine wave is 100 A. Its peak value is

   A. 70.7 A

   B. 141 A

   C. 150 A

   D. 282.8 A

28.  A pure capacitance connected across 50 Hz, 230 V supply consumes 0.04 W. This consumption is attributed to

   A. Ohmic loss due to ohmic resistance of plates

   B. Loss of energy in dielectric

   C. Capacitive reactance in ohms

   D. Both A and B

29.  A circuit with a resistor, inductor and capacitor in series is resonant of f_o Hz. If the all the component of values are now doubled the new resonant frequency is

   A. 2f_o

   B. Still f_o

   C. f_o/4

   D. f_o/2

30.  Which of the following will not be affected due to change in R ?

   A. Bandwidth

   B. Q

   C. Resonant frequency

   D. None

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