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PhysicsCurrent ElectricityEquivalent ResistanceMedium2 minPYQ_2025

PhysicsMediumsingle choice

A wire of resistance $R$ is bent into a triangular pyramid as shown in figure with each segment having same length. The resistance between points $A$ and $B$ is $R / n$ . The value of $n$ is :

Options:

Answer:

Solution:

As $r = \frac{R}{6}$

(As balanced wheat stone bridge is formed) Now, Equivalent resistance between A and B can be written as
$\frac{1}{R _{AB}} = \frac{1}{2 r} + \frac{1}{2 r} + \frac{1}{r} = \frac{2}{r}$
$R_{AB} = \frac{R}{12}$

Stream:JEESubject:PhysicsTopic:Current ElectricitySubtopic:Equivalent Resistance

⏱ 2mℹ️ Source: PYQ_2025

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