What factors affect the resistance of a conductor?

Length,  Area, Conductivity, Temperature

Explanation:

The factors affection the resistance of a conductor are

(1) Length of the conductor (L): As the length (L) of the conductor increases, the Resistance(R) of the conductor also increase.

R ∝ L

(2) Cross sectional Area of the conductor(A): As the cross sectional area of the conductor(A) increases, the Resistance (R) of the of the conductor decreases.

R ∝1/A

(3)  conductivity of the conductor(G): As the conductivity of the (G) of the conductor increases, the Resistance(R) of the conductor decreases.

R ∝ 1/G

(4) Temperature(T): As temperature(T) increases, the Resistance(R) of a conductor decreases.

T ∝ R

Explanation:

There are four factors affecting resistance which are

Temperature,

Length of wire,

Area of the cross-section of wire and

nature of the material.

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete

there are no contact forces mentioned on the list of choices that you've provided.