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प्रश्न
Why is it necessary to introduce a radial magnetic field inside the coil of a galvanometer?
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उत्तर
A radial magnetic field is necessary so that plane of the coil in all positions remain parallel to the direction of magnetic field
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संबंधित प्रश्न
The combined resistance of a galvanometer of resistance 500Ω and its shunt is 21Ω. Calculate the value of shunt.
Explain how moving coil galvanometer is converted into a voltmeter. Derive the necessary formula.
With the help of a neat and labelled diagram, explain the principle and working of a moving coil galvanometer ?
Define the current sensitivity of a galvanometer ?
State the underlying principle of working of a moving coil galvanometer. Write two reasons why a galvanometer can not be used as such to measure current in a given circuit. Name any two factors on which the current sensitivity of a galvanometer depends.
State how a moving coil galvanometer can be converted into an ammeter.
A moving coil galvanometer has 150 equal divisions. Its current sensitivity is 10-divisions per milliampere and voltage sensitivity is 2 divisions per millivolt. In order that each division reads 1 volt, the resistance in ohms needed to be connected in series with the coil will be ______.
A galvanometer shows full-scale deflection for current Ig. A resistance R1 is required to convert it into a voltmeter of range (0 - V) and a resistance R2 to convert it into a voltmeter of range (0 - 2V). Find the resistance of the galvanometer.
Explain in brief the basic construction of a moving-coil table galvanometer whit a neat labelled diagram.
A moving coil galvanometer of resistance 55 Ω produces a full scale deflection for a current of 250 mA. How will you convert it into an ammeter with a range of 0 - 3A?
