Questions
A current I flows through a cylindrical rod of uniform cross-sectional area A and resistivity . The electric flux through the shaded cross-section of rod as shown in figure is:
detailed solution
Correct option is B
The current density J, electric field E at the cross-section are related by J=EρMultiplying both side by A, we getJA=EAρ or I =ϕρ where ϕ is electric flux.or ϕ = ρITalk 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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