Question: Spring controlled moving iron instruments exhibits a square law response resulting in a non-linear scale. The shape of the scale can be made almost linear by :
Answer:
MCQ: Spring controlled moving iron instruments exhibits a square law response resulting in a non-linear scale. The shape of the scale can be made almost linear by :
Correct Answer:
A. Keeping rate of change of inductance L with deflection ,1/Φ(dl/dΦ), as constant
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Related Questions
- 1. An electrodynamometer type of instruments finds its major use as :
- 2. The operating magnetic held in an electrodynamometer type of instrument has a flux density typically about
- 3. An Astatic movement in an electrodynamometer type of instrument is used for :
- 4. In order that an electrodynamometer type of instrument exhibits a pure square law response, the meter range should be limited to :
- 5. A Voltage of 200 V at 5 Hz is applied to an electrodynamometer type of instrument which is spring controlled. The indication on the instrument is
- 6. Thermocouple instruments can be used for a frequency range
- 7. The heater wire of thermocouple instrument is made very thin in order to have
- 8. Electrostatic type instruments are primarily used as
- 9. An hypothetical electrostatic voltmeter with spring control is designed with one fixed and another movable plate. Both plates are in the form of a circle with one plate over the other so as to produce a rotatary motion. If a voltage is applied between them, no rotatry motion is produced because :
- 10. An electrostatic voltmeter draws a small value of current on d.c
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