5) The deflecting torque of an ammeter varies as the square of the current flowing through it. If a current of 10 A produces a deflection of 90°, what deflection would occur for a current of 5 A when the instrument is (a) spring controlled and (b) gravity controlled? [Ans. (a) 22.5°, (b) 14.5°]

5) The deflecting torque of an ammeter varies as the square of the current flowing through it. If a current of 10 A produces a deflection of 90°, what deflection would occur for a current of 5 A when the instrument is (a) spring controlled and (b) gravity controlled? [Ans. (a) 22.5°, (b) 14.5°]

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter5: Components, Symbols, And Circuitry Of Air-conditioning Wiring Diagrams

Section: Chapter Questions

Problem 14RQ: What is the difference between a thermal overload and a magnetic overload? Draw the symbol for each.

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5) The deflecting torque of an ammeter varies as the square of the current flowing through it. If a current of 10
A produces a deflection of 90°, what deflection would occur for a current of 5 A when the instrument is (a)
spring controlled and (b) gravity controlled?
[Ans. (a) 22.5°, (b) 14.5°]

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