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The resistance of a galvanometer coil is...

The resistance of a galvanometer coil is `100 Omega` . The value of current for full scale deflection in it is 1mA. What should be the value of series resistance to be used to convert it into a voltmeter of 12volt range

A

` 11.9K Omega`

B

` 12 K Omega `

C

` 12.1 K Omega`

D

none of the above

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • The resistance of galvanometer coil is 0.1 Komega . The current for full scale deflection is 100 mu A. The value of the resistance put in series to convert it into a voltmeter of range 0.1 volt is –

    A
    `1000Omega`
    B
    ` 100 Omega`
    C
    ` 10 Omega`
    D
    `900 Omega`

  • The resistance of the galvanometer is 25 Omega it gives a full scale deflection when a current of 10mA is passed through it. The value of resistance R used in series to convert it into voltmeter of range 100 volt is :–

    A
    `10,000 Omega`
    B
    `10025 Omega`
    C
    `975 Omega`
    D
    `9975 Omega`

  • The resistance of a moving coil galvanometer is 20Omega . It requires 0.01 A current for full - scale deflection. The value of resistance to convert it into a voltmeter of the range 20 V will be

    A
    `198Omega`
    B
    `1980Omega`
    C
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    D
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