Question: In order that an electrodynamometer type of instrument exhibits a pure square law response, the meter range should be limited to :
Answer:
MCQ: In order that an electrodynamometer type of instrument exhibits a pure square law response, the meter range should be limited to :
Correct Answer:
A. - 45° to +45° about the position for zero mutual inductance between fixed and moving coils
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Related Questions
- 1. 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
- 2. Thermocouple instruments can be used for a frequency range
- 3. The heater wire of thermocouple instrument is made very thin in order to have
- 4. Electrostatic type instruments are primarily used as
- 5. 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 :
- 6. An electrostatic voltmeter draws a small value of current on d.c
- 7. An Quadrant type electrostatic instrument uses two types of connections 1) heterostatic and 2)idiostatic An external battery is used
- 8. The size of electrostatic voltmeter is large as compared with that corresponding electro-magnetic voltmeters because :
- 9. The range of an electrostatic voltmeter can be extended by using :
- 10. The sensitivity of a PMMC instrument is 10kΩ/V. if this instrument is used in the rectifier type voltmeter with the half wave rectification, what would be the sensitivity?
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