Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityEquivalent ResistanceEasy2 minPYQ_2020

PhysicsEasysingle choice

The masses of three wires of copper are in the ratio of $1 : 3 : 5$ and their lengths are in the ratio $5 : 3 : 1$ . The ratio of their electrical resistance is

Options:

Answer:

Solution:

$R = \frac{ρ l}{A},$

$mass = Volume \times density$

$(d = density)$

$\Rightarrow R = \frac{ρ l (l d)}{m}$

$\Rightarrow R \propto \frac{L^{2}}{m}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Current ElectricitySubtopic:Equivalent Resistance

⏱ 2mℹ️ Source: PYQ_2020

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