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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityCircuit AnalysisEasy2 minQB

PhysicsEasysingle choice

In the given circuit, Reading of ammeter is $1 A$ . If each of the $4 Ω$ resistor is replaced by $2 Ω$ resistor, the reading of ammeter will become nearly -

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Solution:

If $r_{A} =$ Ammeter Resistance
then $\Rightarrow 1 A = \frac{10 V}{R_{e q}} = \frac{10}{9 + r_{A}} \Rightarrow r_{A} = 1 Ω$
When $4 Ω$ resistors are replaced by $2 Ω$ , then $\Rightarrow I = \frac{10}{8 + 1} = \frac{10}{9} A = 1.11 A$

Stream:JEESubject:PhysicsTopic:Current ElectricitySubtopic:Circuit Analysis

⏱ 2mℹ️ Source: QB

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