R0, and voltage Vo is applied to its terminals. Find the voltage V
fed to the device as a function of distance x. Analyse separately the
case R >> R0.
0
Ro
1
61 8
Rz
Fig. 3.42.
Fig. 3.43.
3.180. Find the emf and the internal resistance of a source which
is equivalent to two batteries connected in parallel whose emf's
are equal to ei and 62 and internal resistances to R1 and R2.
3.181. Find the magnitude and direction of the current flowing
through the resistance R in the circuit shown in Fig. 3.44 if the
A
1_.7 1
82 '03
Rs
.
182
.B
Fig.3.45.
Fig. 3.44.
emf's of the sources are equal to gi = 1.5 V and t, = 3.7 V and
the resistances are equal to R1 = 10 S2, R2 = 20 S2, R = 5.0 Q.
The internal resistances of the sources are negligible.
3.182. In the circuit shown in Fig. 3.45 the sources have emf's
t i = 1.5 V, g, = 2.0 V, g3 = 2.5 V, and the resistances are
equal to R1 = 10 S2, R 2 = 20 S2, R, = 30 Q. The internal resistances
of the sources are negligible. Find:
(a) the current flowing through the
82
resistance R1;
i 1
(b) a potential difference TA — cps
I I
between the points A and B.
3.183. Find the current flowing through 6°1
T 8 T6
the resistance R in the circuit shown in
Fig. 3.46. The internal resistances of the
Fig. 3.46.
batteries are negligible.
3.184. Find a potential difference CpA — cp B between the plates
of a capacitor C in the circuit shown in Fig. 3.47 if the sources have
emf's F, = 4.0 V and E, = 1.0 V and the resistances are equal
to R, = 10 Q, R2 = 20 Q, and R3 = 30 Q. The internal resistances
of the sources are negligible.