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A galvanometer having a resistance of 50...

A galvanometer having a resistance of `50Omega`, gives a full scale deflection for a current of 0.05A. The length in metre of a resistance wire of area of cross - section `2.97xx10^(-2)cm^(2)` that can be used to convert the galvanometer into an ammeter which can read a maximum of 5A current is (Specific resistance wire `=5xx10^(-7)Omega-m`)

A

9

B

6

C

3

D

`1.5`

Text Solution

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The correct Answer is:
C
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A galvanometer having a resistance of 50Omega , gives a full scale deflection for a current if 0.05 A. The length in metre if a resistance wire of area of cross- section 2.97 xx10^-2cm^2 that can be used to convert the gaivanometer into an ammeter which can read a maximum of 5 A current is (specific resistance of the wire = 5 xx 10^-7Omega-m )

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AAKASH SERIES-APPENDICES ( REVISION EXERCISE )-REVISION EXERCISE (MOVING CHANGES & MEGNETISM)
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