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An ammeter consists of a galvanometer of...

An ammeter consists of a galvanometer of a resistance `45 Omega `shunted with a resistance of` 3 Omega`. If the current rating of that can be measured by the ammeter will be

A

`2A`

B

`4A`

C

`6A`

D

`8A`

Text Solution

Verified by Experts

The correct Answer is:
D
`I_g/I=S/((S+G)) therefore (0.5)/(I.)=3/(45+3)=1/16 therefore I=16 xx 0.5=8A`
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MARVEL PUBLICATION-MAGNETIC EFFECTS OF ELECTRIC CURRENT-MCQ
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