Question: In a permanent magnet moving coil type of ammeter, the current is I=kθ/NBAWhere θ=deflection, k=spring constant, N=numbers of turns of moving coil and B=flux density of the field produced permanent magnet .Temperature is an interfering input to the system. It is known that strength of magnets reduces by 0.02 per cent per °C and the strength of springs reduces by 0. 4 Percent per °C. Which methods should be adopted to apply corrections for the interfering input?
Answer:
MCQ: In a permanent magnet moving coil type of ammeter, the current is I=kθ/NBAWhere θ=deflection, k=spring constant, N=numbers of turns of moving coil and B=flux density of the field produced permanent magnet .Temperature is an interfering input to the system. It is known that strength of magnets reduces by 0.02 per cent per °C and the strength of springs reduces by 0. 4 Percent per °C. Which methods should be adopted to apply corrections for the interfering input?
Correct Answer:
A. Method of inherent insensitivity
Discuss a Question
Related Questions
- 1. In a measurement systems, which of the following static characteristics are desirable
- 2. In Measurement systems, which of the following characteristics are undesirable static Characteristics?
- 3. A Pressure measurement instrument is calibrated between 10 bar and 250 bar. The Scale span of the instrument is
- 4. The output of an instrument under particular environmental conditions is given by the relationshipq<sub>0</sub>= a + bq<sub>i </sub>where q<sub>i </sub>= input and q and b are constants b<strong> ≠ 1, </strong>the theoretical input-output relationship is represented by a straight passing through zero. This is case of
- 5. A reading is recorded as 23.90 C<sup>0. </sup> The reading has
- 6. The scale of a 0-500V voltmeter is divided into ten large divisions representing 50 V each and each large division is further subdivided into 10 small divisions, each representing 5 V. it is used for measurement of output voltage of a potentiometer which can be varied from 0 to 500 v. it is observed that when the sliding contact is moved from its zero position, , there is no perceptible movement of pointer of the voltmeter till the sliding contact reaches a position where the output voltage should be 5 V. Therefore, it can be concluded that
- 7. In the center zero analog ammeter having a range of -10 A + 10 A, there is a detectable change of the pointer from its zero position on either side of the scale only if the current reaches a value of 1A(on either side).The ammeter has a
- 8. A Pressure gauge is calibrated from 0 -50 kN/m<sup>2 </sup>.it has uniform scale with 100 scale divisions. One fifth of scale division can be read with certainty.The gauge has a:
- 9. A d.c. circuit can be represented by an internal voltage source of 50 V.with an output resistance of 100KΩ. In order to achieve 99 percent accuracy for voltage measurement across its terminals, the voltage measuring device should have
- 10. A d.c circuit can be represented by a voltage source of 10 V in series with an output resistance of 1K Ω. An ammeter of 50 Ω resistances is connected to the source terminals for measurement of current. The accuracy of measurement is nearly
You may be interested in:
Electrical and Electronics Measurements and Instrumentation MCQsRecently Added Articles
How Do Java Development Teams Use Docker and Kubernetes to Deploy Applications?
Last updated on: April 24, 2026Posted by: ExamRadar
AI vs Machine Learning: Key Differences Every Professional Should Know
Last updated on: February 13, 2026Posted by: ExamRadar
Office Cleaning Services That Elevate Sydney Offices
Last updated on: February 11, 2026Posted by: ExamRadar
What You Actually Learn About Exam Patterns From RBI Grade B Previous Year Papers?
Last updated on: February 9, 2026Posted by: ExamRadar
Mental Health Support That’s Closer Than You Think
Last updated on: January 7, 2026Posted by: ExamRadar
Transform Your Home’s Exterior with Columbus roofing company
Last updated on: November 27, 2025Posted by: ExamRadar
