Quiz

Q1. The steady state error in case of a PI controller is always,

Q2. Which type of feedback leads to instability in a control system?

Q3. Which of the following statements is true about stability in control systems?

Q4. Source power is modulated with ............... in a closed loop system.

Q5. The ratio of output to input is............at resonance peak.

Q6. If GM is Gain Margin, PM is Phase Margin, GCF is Gain Crossover Frequency and PCF is Phase Crossover Frequency, which of the following is correct?

Q7. The stability of the linear system:

Q8. Which of the following is a necessary condition for the stability of a control system?

Q9. The efficiency of a 400/200 V, 200 kVA singl-phase transformer is 98.5 % at full load at 0.8 lagging power factor. At half load, 0.8 power factor lagging the efficiency is 97.5 %. Calculate the values of core loss and full-load copper loss.

Q10. A transformer takes a current of 0.6 A and absorbs 64 W when the primary is connected to its normal supply of 200 V, 50 Hz, the secondary being on open circuit. The iron loss current is