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Q.

The equivalent resistance is less than either of the two resistances when they are in

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a

Series

b

Parallel

c

Parallel and series

d

First, need to connect in series and then in parallel

answer is B.

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Detailed Solution

The equivalent resistance is less than either of the two resistances when they are in parallel
The way parallel connections are made ensures that each component receives the same voltage. The voltage across each component in a parallel circuit is the same, and the total current is the sum of the currents flowing through all of the components. A parallel circuit is one that only consists of components linked in parallel.
The reciprocals of the resistances of each component are summed, and the reciprocal of the sum is obtained to determine the total resistance of all components. As a result, the value of the lowest resistance will never equal the Total resistance.
 1Rtotal=1R1+1R2 that is, R=Rtotal1

The voltage is given as V=V1=V2
 

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The equivalent resistance is less than either of the two resistances when they are in