An electron beam passes through a magnetic field of $2 \times 10^{-3}\,Wb/m^2$ and an electric field of $1.0 \times 10^4\,V/m$ both acting simultaneously. The path of electron remains undeviated. The speed of electron if the electric field is removed, and the radius of electron path will be respectively
An electron beam passes through a magnetic field of $2 \times 10^{-3}\,Wb/m^2$ and an electric field of $1.0 \times 10^4\,V/m$ both acting simultaneously. The path of electron remains undeviated. The speed of electron if the electric field is removed, and the radius of electron path will be respectively
- [AIIMS 2011]
- A
$10\times 10^6\,m/s,$ $2.43\,cm$
- B
$2.5\times 10^6\,m/s,$ $0.43\,cm$
- C
$5\times 10^6\,m/s,$ $1.43\,cm$
- D
none of these
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