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In comparing the operation of the half-controlled 2-pulse circuit with that of the fully-controlled circuit, which of the following statements are evident? 1. Since half the thyristors are replaced by diodes, a half-controlled converter costs less than a fully-controlled converter. 2. Due to the freewheeling action with a half-controlled bridge-circuit power factor is improved in half-controlled converters. 3. The AC supply current is more distorted due to its zero periods with the half-controlled circuit, compared to a fully-controlled bridge circuit. Select the correct answer using the code given below :
A dishonest shopkeeper purchased one kg pulse at 120 Rs/kg and sell at 150 Rs/kg. He is giving only 800 gm of pulse instead of 1 kg while selling. Which of the following is correct? I. Profit made by the shopkeeper is 56.25% II. Profit on 2 kg pulse is Rs. 100
Consider the following: 1. Pulse-position modulation. 2. Pulse-code modulation. 3. Pulse-width modulation. Which of the above communications are not digital?
The output of a laser has pulse duration of 30 ms and average output power of 1 W per pulse. How much energy is released per pulse if wavelength is 6600 Å?
The output of a laser has pulse duration of 20 ms and average output power of 1.75 W per pulse. How much energy is released per pulse if wavelength is 5890 Å?
The output of a He-Ne laser has pulse duration of 15 ms and average output power of 1 W per pulse. How much energy is released per pulse?
One positive pulse with tw = 75 µs is applied to one of the inputs of an exclusive-OR circuit. A second positive pulse with tw = 15 µs is applied to the other input beginning 20 µs after the leading edge of the first pulse. Which statement describes the output’s relation with the inputs?
In case of a single-pulse width modulation with the pulse width = 2d, to eliminate the 3rd harmonic from the output voltage waveform, the value of the pulse width (2d) must be
In case of a single-pulse width modulation with the pulse width = 2d, to eliminate the 5th harmonic from the output voltage waveform, the value of the pulse width (2d) must be equal to
The amplitude of the nth harmonic of the two-pulse MPM waveform is given by __________ Let d be the width of a single pulse and ɣ be the distance from 0 to the centre of the first pulse.