Physics

Problem

In a laboratory a uniform electric field of magnitude

9.0\times10^{4}\,\text{V}\,\text{m}^{-1}

is set perpendicular to a uniform magnetic field of magnitude

0.30\,\text{T}

. Calculate the speed that a proton must have to pass through the region without deflection. a)

1.5\times10^{5}\,\text{m}\,\text{s}^{-1}

2.7\times10^{5}\,\text{m}\,\text{s}^{-1}

3.0\times10^{5}\,\text{m}\,\text{s}^{-1}

3.0\times10^{6}\,\text{m}\,\text{s}^{-1}