Fig. 8.24 Calculate the equivalent resistance across PQ of the circuit in which six equal resistances of 2 each are connected in hexagonal
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Answer:
Correct option is A)
The combination of resistances is shown in figure.
Maximum resistance will be between P and Q.
R
PQ
=
R+
3
R
+
2
R
R(
3
R
+
2
R
)
=
11R/6
5R
2
/6
=
11
5R
R
QR
=
11R/6
2
R
(R+
3
R
)
=
11R/6
2R
2
/3
=
11
4R
R
PR
=
11R/6
3
R
(R+
2
R
)
=
11R/6
R
2
/2
=
11
3R
.
Hence, the maximum value lies between P and Q.
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