How to increase sensitivity of galvanometer?
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sensitivity of galvanometer is defined as the current in micro ampere required to consume one millimeter deflection on a scale placed 1m away from the mirror.
TO INCREASE SENSITIVITY OF GALVANOMETER
Now we know that :I = Cq/BNASensitivity will be large if for small value of current (I) q in large. To increase "q", we should decrease C/BNA. So,
(i) "C" should be small: For this long wire of small area of cross section should be used. But "C" constant is too small.
(ii) Area of coil should is large: But this makes size of galvanometer large.
(iii) "N" Number of turns of coil should be increased: But this increases the weight of coil.
(iv) "B" should be large: This is achieved by:
(a) Using powerful magnet.
(b) Introducing iron core in coil.
TO INCREASE SENSITIVITY OF GALVANOMETER
Now we know that :I = Cq/BNASensitivity will be large if for small value of current (I) q in large. To increase "q", we should decrease C/BNA. So,
(i) "C" should be small: For this long wire of small area of cross section should be used. But "C" constant is too small.
(ii) Area of coil should is large: But this makes size of galvanometer large.
(iii) "N" Number of turns of coil should be increased: But this increases the weight of coil.
(iv) "B" should be large: This is achieved by:
(a) Using powerful magnet.
(b) Introducing iron core in coil.
Answered by
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A galvanometer is a device which is used to measure the current.
Explanation:
- Sensitivity of galvanometer can be defined as the current which is used by the wire to cause one millimeter of deflection on the scale.
- The sensitivity will be more if small amount of current is applied and shows deflection on scale.
- The sensitivity can be measured by increasing the number of turns of the wire and using the strong magnet and increasing the area of coil.
Learn more about galvanometer:
Difference between ballistic galvanometer and spot galvanometer: https://brainly.in/question/2369781
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