In order to convert a galvanometer into an ammeter

Jamb 1978

In order to convert a galvanometer into an ammeter 

A. a low resistance shunt is connected in parallel 

B. a low resistance shunt is connected in series 

C. a medium resistance shunt is connected in series 

D. a high resistance shunt is connected in parallel 

E. a high resistance shunt is connected in series.

ANSWER: Option A

EXPLANATION: A galvanometer is converted into an ammeter by connecting a low resistance (shunt) in parallel with the galvanometer. 

After the connection, the scale will then be calibrated in ampere and the range of ammeter depends on the values of the shunt resistance.

Additional tip!

A galvanometer can be converted into a voltmeter by connecting a high resistance (multiplier) in series connection within it. The scale is calibrated in volt. The value of the resistance connected in series decides the range of the voltmeter.

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