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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityEquivalent ResistanceEasy2 minPYQ_2021

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The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and same material is $0.25 Ω$ . What will be the effective resistance if they are connected in series?NEET 2021

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Answer:

Solution:

Let the resistance of each wire be $R$

Effective resistance in parallel combination,

$R_{P} = \frac{R}{4}$

$\Rightarrow R = 4 R_{P}$

$\Rightarrow R = 4 \times 0.25 = 1 Ω$

Effective resistance is series combination,

$R_{S} = 4 R$

$\Rightarrow R_{s} = 4 \times 1 = 4 Ω$

Stream:NEETSubject:PhysicsTopic:Current ElectricitySubtopic:Equivalent Resistance

⏱ 2mℹ️ Source: PYQ_2021

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