Example 2 A moving-coil instrument having a resistance of 102, gives a f.s.d. when the current is 8 mA. Calculate the value of the multinlier to be connected in series with the instrument so that it can be used as a voltmeter for measuring p.d.s. upto 100V. The circuit diagram is shown in Figure 6. 1=8 mA RM Ta -Va VM V3D100 V-

Example 2 A moving-coil instrument having a resistance of 102, gives a f.s.d. when the current is 8 mA. Calculate the value of the multinlier to be connected in series with the instrument so that it can be used as a voltmeter for measuring p.d.s. upto 100V. The circuit diagram is shown in Figure 6. 1=8 mA RM Ta -Va VM V3D100 V-

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter29: Dc Generators

Section: Chapter Questions

Problem 1PA: You are working as an electrician in a large steel manufacturing plant, and you are in the process...

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You are working as an electrician in a large steel manufacturing plant, and you are in the process of doing preventive maintenance on a large DC generator. You have megged both the series and shunt field windings and found that each has over 10 M to ground. Your ohmmeter, however, indicates a resistance of 1.5 across terminals S1andS2. The ohmmeter indicates a resistance of 225 between terminals F1andF2. Are these readings normal for this type machine, or is there a likely problem? Explain your answer.
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