A galvanometer has a resistance of 55 ohms. It gives a full scale deflection by a current of 10 m A. What resistance must be connected across it to en

Question

A galvanometer has a resistance of 55 ohms. It gives a full scale deflection by a current of 10 m A. What resistance must be connected across it to en

A galvanometer has a resistance of 55 ohms. It gives a full scale deflection by a current of 10 m A. What resistance must be connected across it to enable it to read 1 ampere ?
A. `5.55Omega`
B. `0.555Omega`
C. `55.5Omega`
D. `0.055Omega`

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - B
`G=55 Omega , I_g = 10m A , I=1A,S=?`
`S=(I_g.G)/(I-I_g)`
`S=(10xx10^-3xx55)/(1-0.010)=0.55Omega` .

4 views Answered 2023-02-05 15:29