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Ac fundamentals
| 1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
| 2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
| Q1 ⇒ The time period of a sine wave is 1/50 seconds.
Its frequency is 50 Hz [other wrong options] [Discuss in forum] |
| Q2 ⇒ What inductance will give the same reactance
as a capacitor of 2 µF when both are at 50 Hz? 5 H [other wrong options] [Discuss in forum] |
| Q3 ⇒ The peak value of a sine wave is 200 V. Its
average value is 127.4V [other wrong options] [Discuss in forum] |
| Q4 ⇒ Capacitive reactance is more when Capacitances is less and frequency of supply is less [other wrong options] [Discuss in forum] |
| Q5 ⇒ For the same peak value which of the
following wave will have the highest r.m.s.
value ? Square wave [other wrong options] [Discuss in forum] |
| Q6 ⇒ Power factor of an inductive circuit is usually
improved by connecting capacitor to it in Parallel [other wrong options] [Discuss in forum] |
| Q7 ⇒ Which of the following circuit component
opposes the change in the circuit voltage Capacitance [other wrong options] [Discuss in forum] |
| Q8 ⇒ The ratio of active power to apparent power
is known as ____ factor. Power [other wrong options] [Discuss in forum] |
| Q9 ⇒ Which of the following waves has the highest
value of peak factor '? Half wave rectifier sine wave [other wrong options] [Discuss in forum] |
| Q10 ⇒ While drawing vector diagram for a series
circuit the reference vector is Current [other wrong options] [Discuss in forum] |
| Q11 ⇒ Selectivities of different resonance circuits
are compared in terms of their Band widths [other wrong options] [Discuss in forum] |
| Q12 ⇒ The series element of a band stop filter is Parallel combination of L and C [other wrong options] [Discuss in forum] |
| Q13 ⇒ For the same peak value of voltage which
wave form will have the least r.m.s. value ? Triangular wave [other wrong options] [Discuss in forum] |
| Q14 ⇒ For the same peak value, which of the
following wave has the least mean value ? Half wave rectified sine wave [other wrong options] [Discuss in forum] |
| Q15 ⇒ The r.m.s. value of a half-wave rectified current
is 100 A. Its value for full-wave
rectification would be____ amperes. 141.4 [other wrong options] [Discuss in forum] |
| Q16 ⇒ Power factor of the following circuit will be
zero Both (B) and (C) [other wrong options] [Discuss in forum] |
| Q17 ⇒ In a purely inductive circuit Actual power is zero [other wrong options] [Discuss in forum] |
| Q18 ⇒ In an A.C. circuit power is dissipated in Resistance only [other wrong options] [Discuss in forum] |
| Q19 ⇒ The frequency of domestic power supply in
India is 50 Hz [other wrong options] [Discuss in forum] |
| Q20 ⇒ The power factor of a series R-L-C circuit at
its half-power points is Lagging or leading [other wrong options] [Discuss in forum] |
| Or |