Two primary cells of e.m.fs. `E_1` and `E_2`, `(E_1 > E_2)` are connected to the potentiometer wire AB as shown in the figure HQ 2.

Two cells of emfs E_(1) and (E_(2) (E_(1) gt E_(2)) are connected as shows in figure When a potentiometer is connected between A and B, the balancing length of the potentiometer wire is 300 cm. On connecting the same potentiometer between A and C, the balancing length is 100 cm. The ratio E_(1)//E_(2)

A cell of e.m.f. 2 V and negligible internal resistance is connected to a potentiometer wire of resistance 10 Omega and length 4 m. The potential difference per unit length (potential gradient ) of the wire is

Two cells of e.m.f E_1 and E_2 have internal resistance r_1 and r_2 respectively. What is the corresponding formula for the series combination?

A cell of e.m.f. 4 V and of negligible internal resistance is connected in series with a potentiometer wire of length 400 cm. The e.m.f. of a Leelanche cell is found to be balacned at 150 cm from the positive end of the potentiometer wire. What is the e.m.f. of the Leclanche cell ?

Two cells, of e.m.f. 2E and E, and internal resistance 2 r and r respectivley are connected in parallel. Obtain the expression for the equivalent e.m.f and the internal resistance of the combination?

Two batteries , one of e.m.f. 18 V and internal resistance 2Omega and the toher of e.m.f. 12 V and internal resistane 1Omega , are connected as shown The voltmeter V will record a reading of

A series of concentric ellipses E_1,E_2, E_3..., E_n are drawn such that E touches the extremities of the major axis of E_(n-1) , and the foci of E_n coincide with the extremities of minor axis of E_(n-1) If the eccentricity of the ellipses is independent of n, then the value of the eccentricity, is

Define e.m.f of a cell. How can you compare the e.m.f of the cells using potentiometer.

If E_1 and E_2 are mutually exclusive, then write down the value of P(E_1capE_2) .

In the circit show in the figure E_1 = 3V, E_2 = 2V, E_3 = 1V and the resistances R = r_1 = r_2 = r_3 = 1Omega . If r_2 is short circuited and the point A is conneted to the point B, find the currents through E_1,E_2 and E_3 and the resistor R