The combined resistance of two resistors `R_1 and R_@ (R_1,R_2>0)` is given by `1/R= 1/R_1 + 1/R_2`. If `R_1 + R_2 =C`(a constant), show that maximum resistance R is obtained by choosing `R_1 = R_2`

In the circuit given ahead, the resistors R_1 and R_2 are connected

If r_(2) +r_(3)+ r = r_(1), then show that Delta is right angled.

Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are R_1 and R_2(R_1gtR_1) . if the potential difference across the source having internal resistance R_2 is zero, then find vlaue of R.

Four resistance R_1,R_2,R_3 and R_4 are connected in parallel. The resultant resistance R is

If R_1 and R_2 are equivalence relations in a set A, show that R_1 nn R_2 is also an equivalence relation

If R_1 and R_2 ·are equivalence relations in a set A, show that R_1 nn R_2 is also an equivalence relation.

Ohms law experiment is performed seperately with individual resistors R_1,R_2 (R_1>R_2) and series combination of R_1, R_2 Graph us placed between potential difference V and current I as shown in figure for each case.Identify which one is for R_1,R_2 and combination of resistors?in the graph A,B,C respectively represents

A cell, with finite internal resistance r, is connected across two external resistances R_1 and R_2(R_1> R_2) , one by one. In which case would the terminal potential difference of the cell more ? Justify your anwer.

Three resistance R_1 , R_2 and R_3 are connected on parallel. Show that their equivalent resistance is 1/R=1/R_1+1/R_2+1/R_3