Suppose in a circuit, a silver wire of length L and cross-sectional area A is replaced by an aluminium wire of length 5L and cross-sectional area 9A. The resistance of the circuit will ______.
(Given that ρ silver = 1.6×10−8 Ω·m and ρ aluminium= 2.6×10−8 Ω·m)
increase to 1.1 times of itself
increase to 1.2 times of itself
decrease to 0.9 times of itself
decrease to 0.8 times of itself