Home Physics Current Electricity Grouping of Resistances For what value of R the net resistance of th…
Physics Current Electricity Grouping of Resistances MCQ (Single Correct)

For what value of R the net resistance of the circuit will be 18 ohms

A
B
C
D

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The correct answer is:
C

Here is in parallel with

hence it can be drawn as

Here is parquet with
hence equivalent resistance is
Hence circuit reduces to


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