Question

Answer the attachment...​

Answer 1

Across X and Y there are two resistance connected in parallel one is 40Ω and other is wheat stone bridge

Equivalent resistance of wheat stone bridge is R

1

=

20+20

20×20

=10Ω and other is R

2

=40Ω coneected in parallel

R

eq

=

40+10

10×40

=

50

400

=8Ω

Hence the resistance across the X and Y is 8Ω