Question

Question 61 in the attached picture

Answer 1

4R/3

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Answer 2

the answer is (d) 3R

FIRSTLY

AFTER A THERE IS R AND DOWN R ARE in parallel

aND there is again R with down R ARE IN SERIES and ano ther R WITH UPPER R ARE IN SERIES

THIS MAKES 2R AND 2R ARE IN PARALLEL

This makes resistance R

NOW this R AND WITH A R AND B R ARE IN SERIES

Now the resistance across the circuit ir 3R