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(D) The magnetic force on a moving charge is given by the Lorentz force formula: $\vec{F} = q(\vec{v} 	imes \vec{B})$.Here,the electron has a negativ

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$-ve\, Y$ direction

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(D) The magnetic force on a moving charge is given by the Lorentz force formula: $\vec{F} = q(\vec{v} 	imes \vec{B})$.Here,the electron has a negative charge $(q = -e)$.The velocity $\vec{v}$ is in the $+X$ direction,and the magnetic field $\vec{B}$ is directed into the plane ($-Z$ direction).Using the right-hand rule for the cross product $\vec{v} 	imes \vec{B}$,the direction is $(+X) 	imes (-Z) = +Y$.Since the charge is negative,the force $\vec{F}$ is in the opposite direction,which is $-Y$.Alternatively,using Fleming's left-hand rule: Point the index finger into the plane (magnetic field),the middle finger in the direction opposite to the electron's motion (conventional current direction,which is $-X$),then the thumb points in the direction of the force,which is $-Y$.

In the given figure,an electron enters a magnetic field directed into the plane of the paper. It deflects in which direction?

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