A galvanometer coil has a resistance of \( 15 \Omega \) and it show...

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A galvanometer coil has a resistance of \( 15 \Omega \) and it shows full deflection when \( 4 \mathrm{~mA} \) current flows through. The value of shunt resistance needed to convert it into an ammeter which can read any current between 0 to \( 6 \mathrm{~A} \), is nearly equal to
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