When a current of 5mA is passed through ...

When a current of 5mA is passed through a galvanometer having a coil of resistance `15Omega`, it shows full sacle deflection. The value of the resistance to be put in series with the galvanometer to convert it into a voltmeter of range `0-10V` is:

`2*535xx10^3Omega`

`4*005xx10^3Omega`

`1*985xx10^3Omega`

`2*045xx10^3Omega`

Verified by Experts

Here, `I_g=5xx10^-3A`, `G=15Omega`, `V=10V`,
`R=V/I_g-G=(10)/(5xx10^-3)-15`
`=2000-15=1*985xx10^3Omega`

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A galvanometer with a coil of resistance 50 Omega shows full-scale deflection when 10 mA current passes through it.

The galvanometer can measure a maximum voltage of 0.5 V.

5 A current can be measured if a shunt of `0.1 Omega` is connected in parallel to it.

It can be used as voltmeter to measure a voltage of 5 V if `450 Omega` resistance is connected in series with the coil of the galvanometer.

It can be used as a voltmeter to measure a voltage of 50 V if `4,950 Omega` resistance is connected in series with the coil of the galvanometer.

`1000Omega`

` 100 Omega`

` 10 Omega`

`900 Omega`

`10 Omega`

`1 Omega`

`0.1 Omega`

`0.01 Omega`