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Two scales on a voltmeter measure voltages up to 20.9 and 30.2 V, respectively. The resistance connected in series with the galvanometer is 15800 for the 20.9-V scale and 30500 for the 30.2-V scale. Determine (a) the coil resistance and (b) the full-scale current of the galvanometer that is used in the voltmeter. (a) Number i jul - (b) Number i Units Units <> <>

Two scales on a voltmeter measure voltages up to 20.9 and 30.2 V, respectively. The resistance connected in series with the galvanometer is 15800 for the 20.9-V scale and 30500 for the 30.2-V scale. Determine (a) the coil resistance and (b) the full-scale current of the galvanometer that is used in the voltmeter. (a) Number i jul - (b) Number i Units Units <> <>

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Two scales on a voltmeter measure voltages up to 20.9 and 30.2 V, respectively. The resistance connected in series with the galvanometer is 15800 for the 20.9-V scale and 30500 for the 30.2-V scale. Determine (a) the coil resistance and (b) the full-scale current of the galvanometer that is used in the voltmeter. (a) Number i (b) Number i Units Units <> ㅁ
Transcribed Image Text:Two scales on a voltmeter measure voltages up to 20.9 and 30.2 V, respectively. The resistance connected in series with the galvanometer is 15800 for the 20.9-V scale and 30500 for the 30.2-V scale. Determine (a) the coil resistance and (b) the full-scale current of the galvanometer that is used in the voltmeter. (a) Number i (b) Number i Units Units <> ㅁ
Expert Solution
Step 1

Given the voltage that voltmeter measures are V1=20.9VV2=30.2V

resistance connected with the V1 is R1=1580ohm

Resistance connected with V2(30.2V) is R2=3050ohm

So let the resistance of the the voltmeter is r and the current is I.

Now writing the equation for the IR=V

 

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