There are $8$ equal resistance $R$ . Two are connected in parallel, such four groups are connected in series. Find total resistance.

8 R

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2 R

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4 R

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R / 2

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Solution

The correct option is C $2 R$
Equivalent resistance of each parallel connection $R_{p} = \frac{R}{2}$
Equivalent resistance between A and B $R_{A B} = 4 \times R_{p} = 4 \times \frac{R}{2} = 2 R$

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There are 8 equal resistance R. Two are connected in parallel, such four groups are connected in series. Find total resistance.

The correct option is C 2 REquivalent resistance of each parallel connection Rp=R2Equivalent resistance between A and B RAB=4×Rp=4×R2=2R

There are $8$ equal resistance $R$ . Two are connected in parallel, such four groups are connected in series. Find total resistance.

The correct option is C $2 R$
Equivalent resistance of each parallel connection $R_{p} = \frac{R}{2}$
Equivalent resistance between A and B $R_{A B} = 4 \times R_{p} = 4 \times \frac{R}{2} = 2 R$