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April 19, 2015

Homework Help: Physics

Posted by Don on Sunday, February 24, 2013 at 9:39pm.

The coil of wire in a galvanometer has a resistance of RC = 78.0 . The galvanometer exhibits a full-scale deflection when the current through it is 0.440 mA. A resistor is connected in series with this combination so as to produce a voltmeter. The voltmeter is to have a full-scale deflection when it measures a potential difference of 21.0 V. What is the resistance of this resistor?

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