A proton, with mass 1.67 × 10^-27 kg and charge +1.6 × 10^-19 C, is sent with velocity $2.3\times 10^4 \mathrm {~m} / \mathrm { s }$ in the +x direction into a region where there is a uniform electric field of magnitude 780 $ {~V} / \mathrm { m }$ in the +y direction. What must be the magnitude and direction of the uniform magnetic field in the region if the proton is to pass through undeflected? Assume that the magnetic field has no x component and neglect gravitational effects.

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The Answer of A proton, with mass 1.67 × 10^-27 kg and charge +1.6 × 10^-19 C, is sent with velocity $2.3\times 10^4 \mathrm {~m} / \mathrm { s }$ in the +x direction into a region where there is a uniform electric field of magnitude 780 $ {~V} / \mathrm { m }$ in the +y direction. What must be the magnitude and direction of the uniform magnetic field in the region if the proton is to pass through undeflected? Assume that the magnetic field has no x component and neglect gravitational effects.

A Proton, with Mass 1 2.3×104 m/s2.3\times 10^4 \mathrm {~m} / \mathrm { s }2.3×104 m/s

A Proton, with Mass 1 $2.3\times 10^4 \mathrm {~m} / \mathrm { s }$