In a laboratory a uniform electric field of magnitude is set perpendicular to a…

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism

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}

(b)

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

(c)

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

(d)

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