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Physics / College Physics 1 / Chapter 21 / Problem 46

College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs

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QUESTION:

Problem 46PE

Find the resistance that must be placed in parallel with a 25.0-Ω galvanometer having a 50.0-μA sensitivity (the same as the one discussed in the text) to allow it to be used as an ammeter with a 10.0-A full-scale reading. Include a circuit diagram with your solution.

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QUESTION:

Problem 46PE

Find the resistance that must be placed in parallel with a 25.0-Ω galvanometer having a 50.0-μA sensitivity (the same as the one discussed in the text) to allow it to be used as an ammeter with a 10.0-A full-scale reading. Include a circuit diagram with your solution.

ANSWER:

Solution 46PE

Find the resistance that must be placed in parallel with a 25.0-Ω galvanometer having a 50.0-μA sensitivity (the same as the one discussed in the text) to allow it to be used as an ammeter with a 10.0-A full-scale reading. Include a circuit diagram with your solution.

Calculate the parallel resistance from relation,

R= r $\frac{\ Ig}{I}$

Here, R is the resultant parallel resistance, r is the internal resistance of galvanometer, IG is the current sensitivity of galvanometer and I is the current reading in ammeter.

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