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प्रश्न
How is current sensitivity increased?
Briefly describe how the current sensitivity of a moving coil galvanometer can be increased.
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उत्तर
A moving coil galvanometer's sensitivity can be enhanced by increasing the number of turns in the coil, the area of the coil, and the magnetic field, while decreasing the couple per unit twist of the suspension.
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संबंधित प्रश्न
Obtain the expression for current sensitivity of moving coil galvanometer.
Why is it necessary to introduce a cylindrical soft iron core inside the coil of a galvanometer?
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Why is it necessary to introduce a radial magnetic field inside the coil of a galvanometer?
Why does a galvanometer when connected in series with a capacitor show a momentary deflection, when it is being charged or discharged?
How does this observation lead to modifying the Ampere's circuital law?
Hence write the generalised expression of Ampere's law.
Write current sensitivity of a galvanomete S.I. unit.
In a moving coil galvanometer the deflection (Φ) on the scale by a pointer attached to the spring is ______.
The coil of galvanometer consists of 100 turns and effective area of 1 square cm. The restoring couple is 10-8 N-m/rad. The magnetic field between the pole pieces is 5T. The current sensitivity of this galvanometer will be ______.
When a galvanometer is shunted with a 4 Ω resistance, the deflection is reduced to one-fifth. If the galvanometer is further shunted with a 2 Ω wire. The further reduction (find the ratio of decrease in current to the previous current) in the deflection will be (the main current remains the same)
To convert a moving coil galvanometer into an ammeter we need to connect a ______.
