(b) Giverr the charactenistics equation: 4 3 2 s + 4s + 9s + 3s + 2 = 0 Determine the stability by "Routh Criterion".

A resistor & a capacitor are connected in series across 230V, ac supply. The current taken by the circuit is 4 A for 50 Hz frequency. The current is reduced to 2 A, when the frequency of supply is decreased to 40 Hz. Determine the value of resistor & the capacitor.

What impedance vector (0- j15) Ohms represents:A. A pure resistance.         C. A pure capacitance.B. A pure inductance.       D. An inductance combined with a capacitance.

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A sinusoidal voltage has a value of 100 volts at 2.5 milliseconds and takes 20 milliseconds to complete one cycle. Then find the maximum cost and the time to reach it for the first time.

A Cockcroft-Walton type voltage multiplier has ten stages with capacitances, all equal to 0.1 μF. The supply transformer secondary voltage is 100 kV at a frequency of 60 Hz. If the load current to be supplied is 5 mA, find (a) the percentage ripple, (b) the regulation, and (c) the optimum number of stages for minimum regulation or voltage drop.

A DC-DC Chopper Circuit with an RL Load has an output current waveform shown below with a duty cycle of 50% and 1ms period. If it has a resistance of lohm and an inductance of 10mH, find the source voltage. output 5A -current 2A ten toff

A sinusoidal voltage has a value of 100 volts at 2.5 milliseconds and completes one cycle.It takes 20 milliseconds. Then find the maximum cost and the time to reach it for the first time