Questions
Two ends of a conductor of variable cross section are connected to the terminals of a battery. EC and ED are intensity of electric field at sections C and D respectively. Then
detailed solution
Correct option is B
If j be the current density, then JC > JD also, resistivity ρ=Ej⇒E=ρj.Since ρ is the same at all sections, we can conclude that EC > ED.Talk 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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