The magnetic lines of force are closer why?
The magnetic lines of force are closer at the poles as the result the force is stronger at the poles but when they are away from the poles, the force is comparatively less strong.
On which factor does resistance depends on? Explain
From the formula of resistance, we have,
Resistance = Resisitivity * Length / Area
So, the resistance depends upon the following factors:
i) Resistivity of the material, which in turn is dependent upon the nature of the material and temperature
ii) Length of the material
iii) Cross sectional area of the material