Single Choice

Sensitivity of a moving coil galvanometer can be increased by _____________. Fill in the blank.

Adecreasing number of turns in rectangular coil
Bdecreasing magnetic induction of magnetic field
Cincreasing area of rectangular coil
Correct Answer
Dincreasing twist constant of phosphor bronze fiber

Solution

Sensitivity is directly proportional to area of the coil, number or truns, current and magnetic field. So, it can be increased by increasing the area of the rectangular coil.

SIMILAR QUESTIONS

Magnetism

Sensitivity of moving coil galvanometer is '$$s$$'. If a shunt of $$\left (\dfrac {1}{8}\right )^{th}$$ of the resistance of galvanometer is connected to moving coil galvanometer, its sensitivity becomes:

Magnetism

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Magnetism

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Magnetism

A moving coil galvanometer has 48 turns and area of coil is $$\displaystyle 4\times { 10 }^{ -2 }{ m }^{ 2 }$$. If the magnetic field is 0.2T, then to increase the current sensitivity by 25% without changing area (A) and field (B) the number of turns should become :

Magnetism

A wire of length $$L$$ is made in the form of a coil in a moving coil galvanometer. To have maximum sensitiveness the shape of the coil is

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The sensitiveness of a moving coil galvanometer can be increased by decreasing

Magnetism

A moving coil galvanometer A has 200 turns and resistance 100 . Another meter B has 100 turns and resistance 40 . All the other quantities are same in both the cases. The current sensistivity of

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Define the current sensitivity of galvanometer.Write its SI unit.

Magnetism

Maximum current that can pass through galvanometer is $$0.002A$$ and resistance of galvonameter is $$R_g = 50\Omega$$. find out shunt resistance to convert in into ammeter of range $$0.5 A$$.

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