How will the resistance be affected if the various parameters are changed as follows?
i) Length increasesx) Resistance increasesii) Area increasesy) Resistance decreasesiii) Resistivity decreasesz) Resistance remains the sameiv) Temperature increasesv) Velocity increases
(i-x) (ii-y) (iii-y) (iv-x ) (v-z)
The resistance of a conductor of length, l and cross-sectional area, A is given by R=ρlA where ρ is the resistivity.
Resistance increases with increase in resistivity, length of the resistor and decreases with decrease in its area. Resistivity is directly propoprtional to the temperature. So, when the temperature increases the resistance increases.