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Relative Strength of Magnetic Field Inferred from Magnetic Field Lines

In an ammeter...

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In an ammeter 0.2% of main current passes through the Galvanometer resistance of galvanometer is G the resistance of ammeter will be

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Q. A galvanometer has a resistance of

16 Ω

.It shows full scale deflection, when a current of

20 m A

is passed through it. The only shunt resistance available is

0.06 Ω

which is not appropriate to convert a galvanometer into an ammeter. How much resistance should be connected in series with the coil of galvanometer so that the range of ammeter is

8 A ?

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