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 :
detailed solution
Correct option is B
I=neAvd ⇒n=IeAvd=6 x 10-61.6 x 10-19π1.5 x 10-323 x 108 =1.77 x 1010 m-3Talk to our academic expert!
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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
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