In the following figure, the reading of an ideal voltmeter V is zero. Then, the relation between R, `r_(1) " and " r_(2)` is

In Fig. A2.6, two cells have equal emf E but internal resistances are r_1 and r_2 . If the reading of the voltmeter is zero, then relation between R, r_1 and r_2 is

The reading of ideal voltmeter V connected across R and the circuit shown is

Two cells of same emf epsilon , but different internal resistances r_(1) " and " r_(2) are connected to an external resistance R, as shown. The voltmeter V reads zero. Find R in terms of r_(1) " and " r_(2) , and the voltage across the cell of internal resistance r_(2) .

In given figure the ammeter A reads 5 A and voltmeter V reads 40 V. The actual value of resistance R is

Consider the circuit shown in the figure, the cell is ideal. The readings of the ideal voltmeters V_(1) and V_(2) in volts are respectively.

Consider the circuit shown in the figure, the cell is ideal. The readings of the ideal voltmeters V_(1) and V_(2) in volts are respectively.

In given figure an ammeter reads 5 A and voltmeter reads 40 V. The actual value of resistance R is

Two cells of same emf E, but different internal resistances r_(1)andr_(2) are connected to an external resistance R as shown in the figure given above. The voltmeter V reads zero. Obtain an expression for R in terms of r_(1)andr_(2) . Calculate the voltage across the cell of internal resistance r_(2) . (Assume that the voltmeter V is of infinite resistance).

Let V and I be the readings of the voltmeter and the ammeter respectively as shown in the figure. Let R_(V) " and "R_(A) be their corresponding resistancce Therefore,