Question

20. In the following figure, the effective resistance
between the points A and B is
3 Ω
3Ω
3 Ω
6ΩΣ 6Ω.
3 Ω
3 Ω
MW
6 Ω
A
3 Ω
B
(1) 3 Ω
(2) 2Ω
(3) 6 Ω
(4) 36 Ω​

Answer 1

Answer:

5 ohm and 15 ohms are in series & in Parallel with 20 ohm.

Hence 20 ohm is in parallel with 20 ohm.(attachment 1)

Hence

R

1

=

20

1

+

20

1

R=10ohm

Now 10 & 6 are in series and in parallel with 48 ohm resistor.

Hence 16 ohm nd 48 ohm r in parallel. (attachment 3).

Hence

R

1

=

16

1

+

48

1

R=12ohm.

LHS

10 & 8 ohms are in series & in Parallel with 9 ohm.

Hence 18 & 9 are in parallel.

R

1

=

9

1

+

18

1

R=6ohm..

will get one triangle in which resistance are in series : 14+12+6

=32ohm.