Discuss the differences between the current coil and voltage coil of a wattmeter from a design point of view.What will be the consequences if the current coil and voltage coil of a wattmeter are interchanged by mistake?What are the possible errors in this measurement?Can you measure power in an ac circuit by using an ammeter and voltmeter? If No, why? If yes, how?What is to be done if the wattmeter reads in the negative direction? Case (1): Resistive load (R)P: WattsSI. No.V: VoltsE AmperescosoQ:VARS:VA(from wattmeter)1.230VOAOWOVA2.230V1A200W230VA3.230V2A450W460VA4.230VЗА700W690VATable (2). Data recorded for Power Measurement- resistive loadCase (2): Inductive load (R-L)P: WattsSI. No.V: VoltsE: AmperescosoQ:VARS:VA(from wattmeter)1.230V0.4A150W1.6VAR92VA2.230V0.8A1150W3.2VAR184VA3.230V1.1A1150W4.4VAR253VA4.230V1.95A1390W7.8VAR448.5VA5.230V2.5A1410W10.04VAR575VATable (3). Data recorded for Power Measurement- inductive loadCase (2): Capacitive load (R-C)P: WattsSI. No.V: VoltsE: AmperescosoQ:VARS:VA(from wattmeter)1.230V0.28A150W1.12VAR64.4VA2.230V0.3A150W1.2VAR69VA3.230V0.75A1150W2.23VAR127.5VA4.230V0.91A1150W3.65VAR209.3VA5.230V1.89A1390W7.59VAR434.7VA6.230V2.35A1390W9.43VAR540.5VATable (4). Data recorded for Power Measurement- Capacitive load AW10A / 300VА0-10AAutoLoadSupply Transformer0-300V230V 50HZ 1ø

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Discuss the differences between the current coil and voltage coil of a wattmeter from a design point of view. What will be the consequences if the current coil and voltage coil of a wattmeter are interchanged by mistake? What are the possible errors in this measurement? Can you measure power in an ac circuit by using an ammeter and voltmeter? If No, why? If yes, how?

Discuss the differences between the current coil and voltage coil of a wattmeter from a design point of view. What will be the consequences if the current coil and voltage coil of a wattmeter are interchanged by mistake? What are the possible errors in this measurement? Can you measure power in an ac circuit by using an ammeter and voltmeter? If No, why? If yes, how?

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter9: Measuring Instruments

Section: Chapter Questions

Problem 14RQ: 14. What is the major difference between a wattmeter and a d’Arsonval meter?

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