(a) A resistance wire is doubled on itself. Calculate the new resistance of the wire.
(b) Three resistors A, B and C are connected in such a way that the total resistance of the combination is
. Show the arrangement of the three resistors and justify your answer.
(a)
Here length becomes half and area becomes double of the initial,
Hence R= ρ l /a = 6 ohm
R' = ρ (L/2) / 2A
Hence, R' =3/2 ohm
(b) No. of resistors is, 3
Total resistance of this combination is