Questions
A battery is connected to a uniform resistance wire AB and B is earthed. Which one of the graphs below shows how the current density J varies along AB
detailed solution
Correct option is D
Wire AB is uniform so current through wire AB at every across section will be same. Hence current density J=i/A at every point of the wire will be sameTalk to our academic expert!
Similar Questions
Electrons emerge from an electron accelerator as a beam having a circular cross-section of diameter 3 mm. The beam current is 6 μA and electrons are travelling so fast that their speed can be taken as m/sec with an insignificant error. Electron density in the beam is :
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