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The voltage sensitivity of a galvanomete...

The voltage sensitivity of a galvanometer can be increased by ________ .

A

increasing the current

B

increasing the couple per unit twist of the suspension wire

C

increasing the number of turns of the coil

D

increasing the magnetic induction .

Text Solution

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The correct Answer is:
d
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Knowledge Check

  • Sensitivity of a potentiometer can be increased by

    A
    increasing the emf of the cell
    B
    increasing the length of the wire
    C
    decreasing the length of the wire
    D
    none of the above

  • The sensitivity of a potentiometer canbe increasesed by

    A
    decreasing the length of potentiometer wire
    B
    increasing the length of potentimeter wire
    C
    increasing the emf of the cell used inprimary circuit
    D
    all the above

  • A galvanometer is used to indicate the ______________.

    A
    direction
    B
    frequency
    C
    voltage
    D
    reference point

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    The coil of a moving coil galvanometer has 5 turns and each turn has an effective area of 2 xx 10^(-2) m^(2) . It is suspended in a magnetic field whose strength is 4 xx 10^(-2) Wb m^(-2) . If the torsional constant K of the suspension fibre is 4xx 10^(9) N m deg^(-1) . (a) Find its current sensitivity in degree per micro - ampere (b) Calculate the voltage sensitivity of the galvanometer for it to havefull scale deflection of 50 divisions for 25 mV. (c ) Compute the resistance of the galvanometer .

    The coil of a moving coil galvanometer has 5 turns and each turn has an effective area of 2 xx 10^(-2) m^(2) . It is suspended in a magnetic field whose strength is 4 xx 10^(-2) Wb m^(-2) . If the torsional constant K of the suspension fibre is 4 xx 10^(-9) N m "deg"^(-1) . Calculate the voltage sensitivity of the galvanometer for it to have full scale deflection of 50 divisions for 25 mV.

    The unit of Galvanometer constant is _______ .

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