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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityEquivalent ResistanceEasy2 minPYQ_2020

PhysicsEasysingle choice

All the edges of a block with parallel faces are unequal. Its largest edge is twice its shortest edge. The ratio of the maximum to the minimum resistance between parallel faces is

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Answer:

Solution:

Let the length of various edges in increase order be $l, x, 2 l$ respectively

$R_{m a x} = \frac{ρ 2 l}{x l} = \frac{2 ρ}{x}; R_{m i n} = \frac{ρ l}{2 l x} = \frac{ρ}{2 x}$

$∴ \frac{R_{m a x}}{R_{m i n}} = 4$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Current ElectricitySubtopic:Equivalent Resistance

⏱ 2mℹ️ Source: PYQ_2020

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