What is the cause of resistance offered by the metallic wire in the flow of current through it?

Find out the magnitude of resistance X in the circuit shown in figure, When no current flows through the 5 Omega resistance

Assertion : Current is passed through a metallic wire, heating it red. Half of its portion is cooled by cold water jacket, then rest of the half portion become more hot. Reason: Resistances decreases due to decrease in temperature and so current through wire increases.

The current enters at A and leaves at F. The values of some resistance are shown. What should be the value of resistance AB so that no current will flow through CB?

Which one of Cu, Fe and Ag offers great resistance to the flow of electric current?

The current enters at A and comes out at D. Some of the resistance are shown. What should be resistance of wire CB so that it draws double of the current that enters the wire BF.

If specific resistance of a potentiometer wire is 10^(–7 ) Omega m , the current flow through it is 0.1 A and the cross-sectional area of wire is 10^(–6) m^(2) then potential gradient will be

Explain why does a metal wire when connected to a cell offer resistance to the flow of current.

A current .I. flows through a metallic wire of radius .r. and the free electrons in it drift with a velocity v_(d) . Calculate the drift velocity of the free electrons through the wire of the same material, having double the radius, when same current flows through it.

If internal resistance of cell is negligible, then current flowing through the circuit is

In the below circuit , AB is a wire of length 100 cm with 5Omega resistance . If there is no deflection in the galvanometer , the current flowing in the wire AB is