Which of the following is an electromagnetically device ?

Related Mcqs:

1. Which of the following is an open loop control system ?

   A. Field controlled D.C. motor B. Ward leonard control C. Metadyne D. Stroboscope...

2. Which of the following devices are commonly used as error detectors in instruments ?

   A. Vernistats B. Microsyns C. Resolvers D. Any of the above...

3. On which of the following factors does the sensitivity of a closed loop system to gain changes and load disturbances depend ?

   A. Frequency B. Loop gain C. Forward gain D. All of the above...

4. As a result of introduction of negative feedback which of the following will not decrease ?

   A. Band width B. Overall gain C. Distortion D. Instability...

5. Due to which of the following reasons excessive bond width in control systems should be avoided ?

   A. It leads to slow speed of response B. It leads to low relative stability C. Noise is proportional to band width D. None of the above...

6. The transfer function is applicable to which of the following ?

   A. Linear and time-in variant systems B. Linear and time-variant systems C. Linear systems D. Non-linear systems F. None of the above...

7. Which of the following is the output of a thermocouple ?

   A. Alternating current B. Direct current C. A.C. voltage D. D.C. voltage F. None of the above...

8. In order to increase the damping of a badly underdamped system which of following compensators may be used ?

   A. Phase-lead B. Phase-lag C. Both A. and B. D. Either A. and B. F. None of the above...

9. The transfer function technique is considered as inadequate under which of the following conditions ?

   A. Systems having complexities and non-linearities B. Systems having stability problems C. Systems having multiple input disturbances D. All of the above...

10. Which of the following can be measured by LVDT ?

    A. Displacement B. Velocity C. Acceleration D. Any of the above...