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Question

Two galvanometers $$A$$ and $$B$$ require $$3 mA$$ and $$6 mA$$ respectively, to produce the same deflection of $$10$$ divisions. Then is,


A
A is more sensitive than B
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B
B is more sensitive than A
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C
A and B are equally sensitive
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D
Sensitiveness of B is twice that of A
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Solution

The correct option is B $$A$$ is more sensitive than $$B$$

The sensitivity ratio is given as,

$$\dfrac{{{S_A}}}{{{S_B}}} = \dfrac{{{I_B}}}{{{I_A}}}$$

$$\dfrac{{{S_A}}}{{{S_B}}} = \dfrac{5}{3}$$

$${S_A} > {S_B}$$

Thus, A is more sensitive than B.


Physics

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