three resistor of resistance R each are combined in various ways .which of the following values of equivalent resistance cannot be determined:-
(A) 3R Ohms
(B) 2/4R Ohms
(C) R/3 Ohms
(D) 2/3R Ohms

Dear Student,

If we connect all resistance in series then we can get the equivalent resistance of 3R.
If we connect all resistance in parallel then we can get the equivalent resistance of R/3.
If we connect 2 resistance in series and 1 resistance in parallel then we can get the equivalent resistance of 2/3R.
If we connect 2 resistance in parallel and 1 resistance in series then we can get the equivalent resistance of 3/2R.

Therefore by combining in various ways, we cannot get the value of 2/4R.

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