A moving coil galvanometer converted into an ammeter reads up to \( 0.03 \mathrm{~A} \) by conne...

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A moving coil galvanometer converted into an ammeter reads up to \( 0.03 \mathrm{~A} \) by connecting a shunt of resistance \( 4 r \) across it and ammeter reads up to \( 0.06 \mathrm{~A} \), when a shunt of resistance \( r \) is used. What is the maximum current which can be sent through this galvanometer if no shunt is used?
(A) \( 0.03 \mathrm{~A} \)
(B) \( 0.04 \mathrm{~A} \)
(C) \( 0.02 \mathrm{~A} \)
(D) \( 0.01 \mathrm{~A} \)
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