The resistance and the magnitude of the current depend on the path that the current takes. The drawing shown three situations in which the current takes different paths through a piece of material. Each of the rectangular pieces is made from a material whose resistivity is R and the unit of length is L0. Each piece of material is connected to a battery of EMF V. Find the ratio of current in a, b & c.

When a battery of 9 V is connected across a conductor and the current flowing is 0.1 A, the resistance is:(a) 90 W (b) 0.9 W (c) 9 W (d) 900 W

An electric current is passed through a circuit containing two wires ofsame material, connected in parallel. If the lengths and radii of the wiresare in the ratio of 3:2 and 2:3, then the ratio of the current passingthrough the wire will

The ratio of the length of the two wires made of the same material is 1 : 3 and their volumes are in the ratio of 2 : 3. What is the ratio of their resistances?

A current,  , flows through a resistor of resistance,  .Find the potential difference,  , across the resistance.

The resistance of a wire of cross-section ‘a’ and length ‘l’ is R ohm. The resistance of another wire of the same material and of the same length but cross-section ‘4a’ will be  then x