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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
Show that the current flowing through a moving coil galvanometer is directly proportional to the angle of deflection of coil.
Why does a galvanometer show a momentary deflection at the time of charging or discharging a capacitor? Write the necessary expression to explain this observation.
Increasing the current sensitivity of a galvanometer may not necessarily increase its voltage sensitivity. Explain, giving reason.
With the help of a neat and labelled diagram, explain the principle and working of a moving coil galvanometer ?
A galvanometer having a coil resistance of 60 Ω shows full-scale deflection when a current of 1.0 amp passes through it. It can be converted into an ammeter to read currents up to 5.0 amp by:
In an ammeter 0.5% of main current passes through galvanometer; If resistance of galvanometer is G, the resistance of ammeter will be.
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 ______.
How is current sensitivity increased?
The figure below shows a circuit containing an ammeter A, a galvanometer G and a plug key K. When the key is closed:
