Q. A galvanometer having a coil resistance of $60 \,\Omega$ shows full scale deflection, when a current of $1.0 \,A$ passes through it. It can be converted into an ammeter to read current up to $5.0\, A$ by

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A

putting series a resistance of $15\, \Omega$

B

putting series a resistance of $240 \,\Omega$

C

putting parallel a resistance of $15 \,\Omega$

D

putting parallel a resistance of $240\, \Omega$

Solution:

$s=\frac{I_{g} G}{I-I_{g}}=15\, \Omega$ in parallel

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