In the circuit shown, both cells are ideal and of fixed emf, the resistance of resistance `R_(1)` has fixed resistance and the resistance of resistor `R_(2)` can be varied (but the value of `R_(2)` is not zero). Then:

Statement I : In the circuit in Fig. 7.46 , both cells are ideal and of fixed emf, the resistor R_(1) has fixed resistance and the resistance of resistor R_(2) can be varied ( but R_(2) is always non zero). Then the electric power delivered to the resistor of resistance R_(1) is independent of the value of resistance R_(2) . Statement II: If potential difference across a fixed resistance is unchanged , the poweer delivered to the resistor remains constant.

In the circuit shown below, the ammeter reading is zero. Then, the value of the resistance R is

In the circuit shown, the galvanometer shows zero current. The value of resistance R is :

In the circuit shown in figure resistance of each wire is r. Net resistance across

If resistors of resistance R_(1) and R_(2) are connected in parallel,then resultant resistance is "

In the circuit shown, each resistor is of resistance R. the equivalent resistance between the terminals A and B is

A cell develops the same power across two resistances R_(1) and R_(2) separately. The internal resistance of the cell is

In the electric circuit shown each cell has an emf of 2 V and internal resistance of 1Omega . The external resistance is 2Omega . The value of the current is (in A)