Bukhovtsev-et-al-Problems-in-Elementary-Physics

ELECTRICITY AND MAGNETISM 325
B
(a)
(h)
B
B
(c)
(d)
Fig. 442
not change. The corresponding distribution of the potential is shown in
Fig. 441. The voltage drop on the internal resistance of the element occurs
along CB and on the resistance R along AFD. The section CH' shows the
voltage drop on the internal resistance ,
equal to Ir and the section AL the
voltage drop on the resistance R.
Since the line depicting the potential ABCDF A is closed, the sum of the
vol tage drops should be equal to the sum of the potential jumps:
eftl +c82=IR+Jr
Hence, 1=R~"
479. The potential is distributed as shown in Fig. 442a, b, c and d.
(8) I ';\!cC2 ; VBA=VB-VA=lJl-I'1=-(cCa-I'2)=O
'1 '2 '1 '2
(b) /=