Objective Questions Short notes Objective questions (Answers are given below) The method of symmetrical components isvery useful for(a) solving unbalanced polyphase circuits(b) analysing the performance of 3-phaseelectrical machinery(c) calculating currents resulting fromunbalanced faults(d) all of the above An unbalanced system of 3-phase voltageshaving RYB sequence actually consists of(a) a positive-sequence component(b) a negative-sequence component(c) a … Read more
Objective Questions Short notes Objective questions (Answers are given below) Transient disturbance is produced in a circuitwhenever(a) it is suddenly connected or disconnectedfrom the supply(b) it is shorted(c) its applied voltage is changed suddenly(d) all of the above. There are no transients in pure resistivecircuits because they(a) offer high resistance(b) obey Ohm’s law(c) have no … Read more
Objective Questions Short notes Objective questions (Answers are given below) A given function f (t) can be represented bya Fourier series if it(a) is periodic(b) is single valued(c) has a finite number of maxima andminima in any one period(d) all of the above. In a Fourier series expansion of a periodicfunction, the coefficient a0 represents … Read more
Next Objective Questions Short notes Objective questions (Answers are given below) Non-sinusoidal waveforms are made up of(a) different sinusoidal waveforms(b) fundamental and even harmonics(c) fundamental and odd harmonics(d) even and odd harmonics only. The positive and negative halves of acomplex wave are symmetrical when(a) it contains even harmonics(b) phase difference between even harmonicsand fundamental is … Read more
Objective Questions Short notes Objective questions (Answers are given below) The minimum number of wattmeter (s) requiredto measure 3-phase, 3-wire balanced orunbalanced power is(a) 1(b) 2(c) 3(d) 4(GATE 2001) A wattmeter reads 400 W when its current coilis connected in the R phase and its pressurecoil is connected between this phase and theneutral of a … Read more