A moving-coil permanent-magnet instrument can be used as flux-meter_____________?
Correct answer: C. by eliminating the control springs
- A. by using a low resistance shunt
- B. by using a high series resistance
- C. by eliminating the control springs
- D. by making control springs of large moment of inertia
Explanation
A PMMC instrument becomes a flux meter when its control springs are removed, so the deflection depends on the total change in flux linkage rather than a restoring spring torque. A shunt would instead adapt the instrument for current measurement.
Last updated
Practise Measurement and Instrumentation
156 free Measurement and Instrumentation MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
1 angstrom is equal to______________?
A CRO is used to measure _________________?
A __________ device prevents the oscillation of the moving system and enables the latter to reach its final position quickly___________?
A direct current can be measured by________________?
A dynamometer wattmeter can be used for______________?