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An electric field of 1500 \mathrm{Vm}^{-1} and a magnetic field of 0.40 \mathrm{Wbm}^{-2} act on a moving electron. The minimum uniform speed along a straight line the electron could have is

Option: 1

1.6 \times 10^{15} \mathrm{~ms}^{-1}


Option: 2

6 \times 10^{16} \mathrm{~ms}^{-1}


Option: 3

3.75 \times 10^3 \mathrm{~ms}^{-1}


Option: 4

3.75 \times 10^2 \mathrm{~ms}^{-1}


Answers (1)

best_answer

Here, \mathrm{E=1500 \mathrm{Vm}^{-1}, B=0.4 \mathrm{Wbm}^{-2} }
Minimum speed of electron along the straight line
\mathrm{\begin{aligned} v & =\frac{E}{B}=\frac{1500}{0.4}=3750 \\ & =3.75 \times 10^3 \mathrm{~ms}^{-1} \end{aligned} }

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