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If an electron revolves in the path of a circle of radius $0.5 \times 10^{- 10}$ m at a frequency of $5 \times 10^{15}$ cycles/s, the electric current in the circle is (charge on an electron $= 1.6 \times 10^{- 19} C$ ).

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0.4mA

0.8mA

1.2mA

1.6mA

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detailed solution

Correct option is B

i=ΔQΔt=ef=1.6×10-19×5×1015=8×10-4=0.8mA

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If an electron revolves in the path of a circle of radius 0.5×10−10 m at a frequency of 5×1015 cycles/s, the electric current in the circle is (charge on an electron =1.6×10−19C ).

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material

If an electron revolves in the path of a circle of radius $0.5 \times 10^{- 10}$ m at a frequency of $5 \times 10^{15}$ cycles/s, the electric current in the circle is (charge on an electron $= 1.6 \times 10^{- 19} C$ ).