(Solved): Suppose an electron is located at the origin of an \( x y z \) coordinate system and has velocity ...

Suppose an electron is located at the origin of an \( x y z \) coordinate system and has velocity \( \vec{v} \) directed in the \( x y \) plane as shown in Fig. 28.2.5. The angle between \( \vec{v} \) and \( +x \) axis is \( \phi=30 \). There is a magnetic field \( \vec{B} \) pointing in the \( +z \) direction. Interactive Figure 28.2.5: An electron has velocity \( \vec{v} \) that is directed in the \( x y \) plane. The electron is immersed in a magnetic field that points in the \( +z \) direction. What is the direction of the magnetic force on the electron? The four Roman numerals label the four quadrants of the \( x y \) plane. What is the direction of the magnetic force \( \vec{F}_{B} \) on the electron at the instant shown in Fig. 28.2.5? \( \vec{F}_{B} \) lies in quadrant \( \mathrm{I} \) of the \( x y \) plane when its tail is drawn at the origin. \( \vec{F}_{B} \) lies in quadrant II of the \( x y \) plane when its tail is drawn at the origin. \( \vec{F}_{B} \) lies in quadrant III of the \( x y \) plane when its tail is drawn at the origin. \( \vec{F}_{B} \) lies in quadrant IV of the \( x y \) plane when its tail is drawn at the origin. \( \vec{F}_{B} \) points in the \( +z \) direction. \( \vec{F}_{B} \) points in the \( -z \) direction.