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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityEquivalent ResistanceEasy2 minPYQ_2020

PhysicsEasysingle choice

If $σ_{1}$ , $σ_{2}$ and $σ_{3}$ are the conductances of three conductors, then their equivalent conductance, when they are joined in series will be

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Answer:

Solution:

$R = R_{1} + R_{2} + R_{3}$

$\frac{1}{σ} = \frac{1}{σ_{1}} + \frac{1}{σ_{2}} + \frac{1}{σ_{3}}$

$\Rightarrow σ = {(\frac{1}{σ_{1}} + \frac{1}{σ_{2}} + \frac{1}{σ_{3}})}^{- 1}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Current ElectricitySubtopic:Equivalent Resistance

⏱ 2mℹ️ Source: PYQ_2020

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