D) Σ Η
LULU
44.
n, na
Consider N = identical cells, each of emf ε and internal resistance r. Suppos
ni
The combination drives a current in an external resister. The current in the extern
resistance is
n 2
n, E
na
B)
A)
D)
C)
ne
R+
nr
n,
R+
nr
N₂
R+
R+hr
R+hr
n₂
n
п,
such lines are connected in parallel.the combination drives a current in an external resister.The current in the resistence
Answers
Answer:
a) Total emf =n
1
E
in 1 row
Total emf in all news =n
1
E
Total resistance in one row =n
1
r
Total resistance in all rows =
n
2
n
1
r
Net resistance =
n
2
n
1
r
+R
Current =
n
1
r/n
2
+R
n
1
E
=
n
1
r+n
2
R
n
1
n
2
E
b) i=
n
1
r+n
2
R
n
1
n
2
E
for i=max
n
1
r+n
2
R=min
⇒(
n
1
r
−
n
2
R
)
2
+2
n
1
m
2
R
=min
it is min, when
n
1
r
=
n
2
R
→n
1
r=n
2
R
i is max when n
1
r=n
2
R
a) Total emf =n
1
E
in 1 row
Total emf in all news =n
1
E
Total resistance in one row =n
1
r
Total resistance in all rows =
n
2
n
1
r
Net resistance =
n
2
n
1
r
+R
Current =
n
1
r/n
2
+R
n
1
E
=
n
1
r+n
2
R
n
1
n
2
E
b) i=
n
1
r+n
2
R
n
1
n
2
E
for i=max
n
1
r+n
2
R=min
⇒(
n
1
r
−
n
2
R
)
2
+2
n
1
m
2
R
=min
it is min, when
n
1
r
=
n
2
R
→n
1
r=n
2
R
i is max when n
1
r=n
2
R