Question

A uniform magnetic field exists in the plane of paper pointing from left to right as shown in Figure. In the field an electron and a proton move as shown. The electron and the proton experience

• A. Forces both pointing into the plane of paper
• B. Forces both pointing out of the plane of paper
• C. Forces pointing into the plane of paper and out of the plane of paper, respectively
• D. Force pointing opposite and along the direction of the uniform magnetic field respectively

Answer 1

The correct option is C Forces pointing into the plane of paper and out of the plane of paper, respectively

The direction of force is perpendicular to the direction of magnetic field and current as given by Fleming’s left hand rule.