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An ammeter of 5 ohm resistance can read...

An ammeter of 5 ohm resistance can read 5 mA . If it is to be used to read 100 volts, how much resistance is to be connected in series

A

19.995 `Omega`

B

19995 `Omega`

C

1999.5 `Omega`

D

199.95 `Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
`V=l_g""(G+R)`
`100=5/(1000)(5+R)`
`rArr" "20000=5+R`
`rArr" "R=20000-5`
`=19995Omega`
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