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To calculate an unknown resistance with ...

To calculate an unknown resistance with the help of a meter bridge why is it advised to change the gap with the known and unknown resistance?

A

To eliminate the resistance of the connecting wire and copper strip

B

To include the resistance of the connecting wire and copper strip

C

To balance the known and unknown resistance

D

To eliminate the resistance of the gap.

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In a meter bridge when the resistance in the left gap is 4 Omega and an unknown resistance in the right gap the balance point is obtained at 40 cm from the zero end. On shunting the unknown resistance with 4 Omega , find the shift of the balance point on the bridge wire

In a metre bridge when the resistance in the left gap is 2Omega and an unknown resistance in the right gap, the balance point is obtained at 40 cm from the zero end. On shunting the unknown resistance with 2Omega , find the shift of the balance poiont on the bridge wire.

Knowledge Check

  • Which error of meter bridge is removed when the known and unknown resistances are interchanged?

    A
    End error
    B
    Measurement error
    C
    Percentage error
    D
    Parallax error

  • In above question the value of unknown resistance is

    A
    `664Omega`
    B
    `100Omega`
    C
    `348Omega`
    D
    `864Omega`

  • When unknown resistance is determined by meter bridge, the error due to contact resistance is minimised by

    A
    connecting both the resistances only in one gap
    B
    interchanging the position of known and unknown resistances
    C
    using uniform wire
    D
    obtaining the null point near the ends of the wire

    • Similar Questions

    Explore conceptually related problems

    In a metre bridge when the resistance in the left gap is 2Omega and an unknown resistance in the right gap, the balance point is obtained at 40 cm from the zero end. On shunting the unknown resistance with 2Omega find the shift of the balance point on the bridge wire.

    Draw the circuit diagram to determine unknown resistance using meter bridge. Write the equation used for determining the unknown resistance.

    Explain the use of a metre bridge for finding unknown resistance.

    Temperature and resistance, Wheatstone Bridge and Meter Bridge

    When unknown resistance is determine by meter bridge, the error due to contact resistance is minimized _____.

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