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PhysicsCurrent ElectricityEquivalent ResistanceMedium2 minQB

PhysicsMediumsingle choice

A uniform wire of resistance $36 Ω$ is bent in the form of a circle. The effective resistance between $A$ and $B$ is ( $O$ is the centre of circle):

Source diagram

Answer:

Solution:

The $3 0^{\circ}$ arc has resistance

$R_{1} = 36 \frac{30}{360} = 3 Ω$

$R_{2} = 36 - 3 = 33 Ω$

The arcs are connected in parallel.

$R_{eq} = \frac{3 \times 33}{3 + 33} = 2.75 Ω$

Stream:JEESubject:PhysicsTopic:Current ElectricitySubtopic:Equivalent Resistance

⏱ 2mℹ️ Source: QB

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