Question

A galvanometer has an internal resistance of 40? and deflects full scale for a 60?uA current....

A galvanometer has an internal resistance of 40? and deflects full scale for a 60?uA current.

Describe how to use this galvanometer to make an ammeter to read currents up to 25A .

A resistor must be placed in parallel with the galvanometer.

A. What is the magnitude of this resistor?

Describe how to use this galvanometer to make a voltmeter to give a full-scale deflection of 300V .

A resistor must be placed in series with the galvanometer.

B. What is the magnitude of this resistor?

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