Author name: shubham kumar

What is meant by “electrical resistance” of a conductor? State how resistance of a conductor is affected when (i) a low current passes through it for a short duration; (ii) a heavy current passes through it for about 30 seconds. How is the resistivity of alloys compared with those of pure metals from which they […]

V – I graphs for two wires A and B are shown in the figure. If both the wires are made of same material  and  are  of  same  length,  which  of  the  two  is  thinner?  Give  justification  for  your answer.        (2)