Which value best represents the equivalent resistance between points A and B in the circuit shown? Here R1 = 5 Ω, R2 = 7 Ω and R3 = 3 Ω.

Answer(a)   the matererials that are in contact, the two materials and the nature of their surfaces/// (b)/// the force pushing the two surfaces together, pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other

B. elliptical. as in oval. 0 (==

Can you give more detail