Qstnid -Iv-23-if The Reading Of The Ammeter, A<sub>1</sub> In The Figure (32-e4) Is 2.4 A, What Will Be The Readings Of Ammeters A<sub>2</sub> And A<sub>3</sub>? Neglect The Resistances Of The Ammeters. <Span Style="background-color: #B22222;">figure </Span><span Style="background-color: #B22222;">32-e4</span> - 32: Electric Current In Conductors - Neet-xii-physics

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NEET-XII-Physics

32: Electric Current in Conductors

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#23
If the reading of the ammeter, A₁ in the figure (32-E4) is 2.4 A, what will be the readings of ammeters A₂ and A₃? Neglect the resistances of the ammeters.
figure 32-E4
Ans :
Given: i₁ = 2.4 A
Since the 20 Ω and 30 Ω resistors are connected in parallel, the voltage across them will be the same.
From the figure,
`` 20{i}_{1}=30\left(i-{i}_{1}\right)``
`` \Rightarrow 50{i}_{1}=30i``
`` \Rightarrow i=\frac{50{i}_{1}}{30}=3.99=4\,\mathrm{\,A\,}``
`` ``
∴ The reading of ammeter A3 = i = 4 A
The reading of ammeter A2 = i - i₁ = 1.6 A
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