RRB NTPC/ASM/CA/TA Exam > RRB NTPC/ASM/CA/TA Questions > Which instruments can be used for DC measurem...
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Which instruments can be used for DC measurement only?
- a)Permanent magnet moving coil
- b)Attraction-type moving iron
- c)Moving iron
- d)Repulsion-type moving iron
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Which instruments can be used for DC measurement only?a)Permanent magn...
The instruments which use the permanent magnet for creating the stationary magnetic field between which the coil moves is known as the permanent magnet moving coil or Permanent magnet moving coil instrument. It operates on the principle that the torque is exerted on the moving coil placed in the field of the permanent magnet. The permanent magnet moving coil instrument gives the accurate result for DC measurement.
- The permanent magnet moving coil instruments are only used for the direct current. The alternating current varies with the time. The rapid variation of the current varies the torque of the coil. But the pointer can not follow the fast reversal and the deflection of the torque. Thus, it cannot use for AC.
- The cost of the permanent magnet moving coil instruments is much higher as compared to the moving coil instruments.
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Which instruments can be used for DC measurement only?a)Permanent magnet moving coilb)Attraction-type moving ironc)Moving irond)Repulsion-type moving ironCorrect answer is option 'A'. Can you explain this answer?
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Which instruments can be used for DC measurement only?a)Permanent magnet moving coilb)Attraction-type moving ironc)Moving irond)Repulsion-type moving ironCorrect answer is option 'A'. Can you explain this answer? for RRB NTPC/ASM/CA/TA 2025 is part of RRB NTPC/ASM/CA/TA preparation. The Question and answers have been prepared according to the RRB NTPC/ASM/CA/TA exam syllabus. Information about Which instruments can be used for DC measurement only?a)Permanent magnet moving coilb)Attraction-type moving ironc)Moving irond)Repulsion-type moving ironCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for RRB NTPC/ASM/CA/TA 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which instruments can be used for DC measurement only?a)Permanent magnet moving coilb)Attraction-type moving ironc)Moving irond)Repulsion-type moving ironCorrect answer is option 'A'. Can you explain this answer?.
Which instruments can be used for DC measurement only?a)Permanent magnet moving coilb)Attraction-type moving ironc)Moving irond)Repulsion-type moving ironCorrect answer is option 'A'. Can you explain this answer? for RRB NTPC/ASM/CA/TA 2025 is part of RRB NTPC/ASM/CA/TA preparation. The Question and answers have been prepared according to the RRB NTPC/ASM/CA/TA exam syllabus. Information about Which instruments can be used for DC measurement only?a)Permanent magnet moving coilb)Attraction-type moving ironc)Moving irond)Repulsion-type moving ironCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for RRB NTPC/ASM/CA/TA 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which instruments can be used for DC measurement only?a)Permanent magnet moving coilb)Attraction-type moving ironc)Moving irond)Repulsion-type moving ironCorrect answer is option 'A'. Can you explain this answer?.
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