A proton, with mass 1.67 times 10^-27 kg and charge +1.6 times 10-19 C, is sent

Question

A proton, with mass 1.67 times 10^-27 kg and charge +1.6 times 10-19 C, is sent with velocity 7.1 times 10^4 m/s in the +x direction into a region where there is a uniform electric field of magnitude 730 V/m in the +y direction. What are the magnitude and direction of the uniform magnetic field in the region, if the proton is to pass through undeflected? Neglect gravitational effects. A) 1.020T, +x direction B) 1.020T, +z direction C) 0.0IT, -z direction D) 0.01T, -y direction E) 0.01T, +z direction

Explanation / Answer

Electric field will exert a force in - y direction on electron, so magnetic field should be such that that it exerts a force in + y direction.So magnetic field has to be in - z direction. So, only option is C for -Z direction.

So answer C is correct.

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